Since December 2006, the new stage MAMI-C of the Mainz microtron has been accelerating electrons to 1500 MeV energy. Crossing the threshold for kaon generation has opened up new possibilities to study strange hadrons and their interactions in nuclear systems at this precision machine. The study of systems with strangeness provides an additional degree of freedom for the experiments at MAMI to gain deeper insight into the low energy structure of the theory of strong interaction (QCD). While the internal structure of hadrons and their excitation spectra are important aspects of QCD in the low energy limit, it is also important to study how nuclear physics ties in with this theory and how the strongly bound systems emerge from this theory.
The Kaos spectrometer with its short design is used to study the structure of hadrons in (e,e'K) reactions. An important measurement program on the Kaos spectrometer includes the generation of kaons at forward angles. In another program, φ mesons are to be generated inside atomic nuclei and detected by their decay into two kaons. This study allows conclusions to be drawn about quasi-stationary states in cold nuclei at normal nuclear density. The theoretical description of such a system of strongly interacting particles takes up models of the internal structure of hadrons, as well as far-reaching questions about the formation of nuclear structures. For the medium-term future, the scientific program of the project also includes the kaon-associated production of atomic nuclei in which a nucleon has been replaced by a hyperon. The study of these so-called hyperons can shed light on structures that remain hidden in conventional nuclear matter; the hyperon opens up the possibility of selectively studying the hadronic many-body problem, since it is not subject to the Pauli principle and can also populate low-lying nuclear levels.
The Three Spectrometer Setup
Kaos spectrometer
Liquid Hydrogen/Deuterium target
Target loop:
This target is designed as a "Basel-Loop" target. The liquid Hydrogen/Deuterium is moved by a fan ("Ventilator") in a closed loop. By this the heat of the energy deposition by the electron beam (up to 40 µA!) is continously moved to the heat exchanger ("Wärmetauscher").
The heat exchanger is cooled by a Philips cryo generator with a power of approx. 60 W.
To avoid density fluctuations the beam is moved by a fast wobbler across the target cell. This is done with an amplitude of 6 mm in horizontal and vertical direction at an frequency of several kHz. The actual position information is added to the event information in the data stream.
Target cell:
The target cell has a length of 48 mm and a width of 10 mm. The geometry is choosen to maximize the luminosity by a long target cell and to minimize the uncertainty by energy loss.
With this target cell we are able to reach luminosities of up to 50 MHz/µbarn (= 5·1037 s-1cm-2).
Schematic view of the completed cryo system:
Detector systems
Optical properties of the A1 spectrometers
| units | A | B | C | |
| Configuration | - | QSDD | D | QSDD |
| dispersive plane | - | point-ponit | point-ponit | point-ponit |
| non dispersive plane | - | parallel-ponit | point-ponit | parallel-ponit |
| Maximum momentum | [MeV/c] | 735 | 870 | 551 |
| Reference momentum | [MeV/c] | 630 | 810 | 459 |
| Central Momentum | [MeV/c] | 665 | 810 | 490 |
| Solid Angle | [msr] | 28 | 5.6 | 28 |
| Scattering Angle | - | - | - | - |
| minimum angle | - | 18° | 7° | 8° |
| maximum angle | - | 160° | 62° | 160° |
| Momentum acceptance | - | 20% | 15% | 25% |
| Angular acceptance | - | - | - | - |
| dispersive | [mrad] | 70 | 70 | 70 |
| nondispersive | [mrad] | 100 | 20 | 100 |
| Long target acceptance | [mm] | 50 | 50 | 50 |
| angle of focal plane | - | 45° | 47° | 45° |
| length of focal plane | [m] | 1.80 | 1.80 | 1.60 |
| length of central trajectory | [m] | 10.75 | 12.03 | 8.53 |
| Dispersion (central) | [cm/%] | 5.77 | 8.22 | 4.52 |
| Magnification (central) | - | 0.53 | 0.85 | 0.51 |
| Dispersion/Magnification | [cm/%] | 10.83 | 9.64 | 8.81 |
| momentum resolutuon | - | 10⁻⁴ | 10⁻⁴ | 10⁻⁴ |
| angular resolution at target | [mrad] | <3 | <3 | <3 |
| position resolution at target | [mm] | 3-5 | 1 | 3-5 |
Picture gallery
Videos
A flight through the Spectrometer Hall (MPEG, 23 MB)
A short flight through the hall (24 frames/sec) (MPEG, 1.5 MB)
Publications
Precise measurement of the Λ-binding energy difference between ΛH and Λ⁴H via decay-pion spectroscopy at MAMI
Ryoko Kino et al.,
Beam-Normal Single-Spin Asymmetry in Pb208 at Low Energy: Discrepancy Resolved or New Kinematic Puzzle?
A. Esser et al.,
arXiv:2508.18851 [nucl-ex] INSPIRE
Phys.Rev.Lett. 135 (2025) 23, 232502
Production of the neutron-rich nucleus 6H in an electron-scattering experiment at MAMI-A1
Tianhao Shao et al.,
Nucl.Phys.A 1063 (2025) 123196
Measurement of the helicity-dependent response in quasi-elastic proton knockout from 40Ca
T. Kolar et al.,
arXiv:2504.09972 [nucl-ex] INSPIRE
Measurement of the 40Ar(e,e′) elastic scattering cross section with a novel gas-jet target
M. Littich et al.,
arXiv:2503.18965 [physics.ins-det] INSPIRE
A novel FPGA-based data acquisition for high-precision asymmetry measurements at low rates in electron scattering
A. Esser et al.,
Nucl.Instrum.Meth.A 1072 (2025) 170187
Measurement of ⁶H Ground State Energy in an Electron Scattering Experiment at MAMI-A1
Tianhao Shao et al.,
arXiv:2501.01232 [nucl-ex] INSPIRE
Phys.Rev.Lett. 134 (2025) 16, 162501
Measurement of the 12C(e,e′) Cross Sections at Q²=0.8 GeV²/c²
M. Mihovilovič et al.,
arXiv:2406.16059 [nucl-ex] INSPIRE
Few Body Syst. 65 (2024) 3, 78
A highly segmented neutron polarimeter for A1
R. Spreckels et al.,
arXiv:2308.06131 [physics.ins-det] INSPIRE
Nucl.Instrum.Meth.A 1062 (2024) 169171
Nuclear density dependence of polarization transfer in quasi-elastic A(e,e′p) reactions
T. Kolar et al.,
arXiv:2311.01935 [nucl-ex] INSPIRE
Phys.Rev.C 110 (2024) 6, L061302
Measurement of polarization transfer in the quasi-elastic Ca40(e,e′p) process
T. Kolar et al.,
arXiv:2306.05565 [nucl-ex] INSPIRE
Non-forward radiative corrections to electron-carbon scattering
M. Mihovilovič et al.,
arXiv:2303.12196 [hep-ph] INSPIRE
Eur.Phys.J.A 59 (2023) 10, 225
Measurement of the α-Particle Monopole Transition Form Factor Challenges Theory: A Low-Energy Puzzle for Nuclear Forces?
S. Kegel et al.,
Phys.Rev.Lett. 130 (2023) 15, 152502
Low-Q² elastic electron-proton scattering using a gas jet target
Y. Wang et al.,
arXiv:2208.13689 [nucl-ex] INSPIRE
Phys.Rev.C 106 (2022) 4, 044610
The spectrometer and target systems for hypernuclear physics at the Mainz Microtron
P. Achenbach et al.,
Nucl.Instrum.Meth.A 1043 (2022) 167500
Measurements of the electron-helicity asymmetry in the quasi-elastic A(e→,e′p) process
T. Kolar et al.,
Systematic treatment of hypernuclear data and application to the hypertriton
P. Eckert et al.,
arXiv:2201.02368 [physics.data-an] INSPIRE
Rev.Mex.Fis.Suppl. 3 (2022) 3, 0308069
Measurement of the generalized polarizabilities of the proton at intermediate Q²
H. Fonvieille et al.,
Phys.Rev.C 103 (2021) 2, 025205
Operation and characterization of a windowless gas jet target in high-intensity electron beams
B.S. Schlimme et al.,
arXiv:2104.13503 [physics.ins-det] INSPIRE
Nucl.Instrum.Meth.A 1013 (2021) 165668
Measurements of the induced polarization in the quasi-elastic A(e,e′p) process in non-coplanar kinematics
S. Paul et al.,
Comparison of recoil polarization in the 12C(e,e'p) process for protons extracted from s and p shells
Kolar, T. et al.,
Beam-normal single spin asymmetry in elastic electron scattering off 28Si and 90Zr
A. Esser, M. Thiel, P. Achenbach, K. Aulenbacher, S. Aulenbacher et al.
Polarization transfer to bound protons measured by quasi-elastic electron scattering on 12C
Tilen Brecelj et al.
Phys.Rev.C 101 (2020) 6, 064615
New Insight in the Q²-Dependence of Proton Generalized Polarizabilities
J. Beričič et al.,
Phys.Rev.Lett. 123 (2019) 19, 192302
The proton charge radius extracted from the Initial State Radiation experiment at MAMI
M. Mihovilovič et al.,
Quasi-elastic polarization-transfer measurements on the deuteron in anti-parallel kinematics
S. Paul et al.,
Phys.Lett.B 795 (2019) 599-605
The influence of Fermi motion on the comparison of the polarization transfer to a proton in elastic e→p and quasi-elastic e→A scattering
S. Paul et al.,
Phys.Lett.B 792 (2019) 445-449
Virtual Compton Scattering measurements in the nucleon resonance region
A. Blomberg et al.,
Eur.Phys.J.A 55 (2019) 10, 182
First Measurement of the Q2 Dependence of the Beam-Normal Single Spin Asymmetry for Elastic Scattering off Carbon
A. Esser et al.,
Phys.Rev.Lett. 121 (2018) 022503
Components of polarization-transfer to a bound proton in a deuteron measured by quasi-elastic electron scattering
D. Izraeli et al.,
arXiv:1801.01306 [nucl-ex] INSPIRE
Phys.Lett. B781 (2018) 107-111
Measurement of polarization-transfer to bound protons in carbon and its virtuality dependence
D. Izraeli et al.,
arXiv:1711.09680 [nucl-ex] INSPIRE
Beam helicity asymmetries in K+Λ electroproduction off the proton at low Q2
P. Achenbach et al.,
Beam-Recoil Polarization Measurement of π0 Electroproduction on the Proton
in the Region of the Roper Resonance
S. Štajner et al.,
Phys. Rev. Lett. 119 (2017) 022001
First measurement of proton's charge form factor at very low Q2 with initial state radiation
M. Mihovilovič, A. Weber, et al.,
Phys. Lett. B, 771 (2017) 194-198
Polarization-transfer measurement to a large-virtuality bound proton in the deuteron
I. Yaron, D. Izraeli, et al.,
Phys. Lett. B 769 (2017) 21–24
Measurement of the p(e,e' π+)n reaction close to threshold and at low Q2
I. Friščić et al.,
Phys. Lett. B766 (2017) 301-305
A short-orbit spectrometer for low-energy pion detection in electroproduction experiments at MAMI
D. Baumann et al.,
Nucl.Instrum.Meth. A874 (2017) 79-87
Vertical Beam Polarization at MAMI
B.S. Schlimme et al.,
Nucl.Instrum.Meth. A850 (2017) 54-60
Differential cross section measurement of the 12C(e,e'pp)10Beg.s. reaction
M. Makek et al.,
Ground-state binding energy of Λ4H from high-resolution decay-pion spectroscopy
F. Schulz et al.,
Measurement of the beam-recoil polarization in low-energy virtual Compton scattering from the proton
L. Doria et al.,
Phys. Rev. C 92, 054307 (2015)
Observation of Λ4H Hyperhydrogen by Decay-Pion Spectroscopy in Electron Scattering
A. Esser et al.,
Phys. Rev. Lett. 114, 232501 (2015)
Electric and magnetic form factors of the proton
J. C. Bernauer et al.,
Phys. Rev. C 90, 015206 (2014)
Search at the Mainz Microtron for Light Massive Gauge Bosons Relevant for the Muon g-2 Anomaly
H. Merkel et al.,
Phys. Rev. Lett. 112, 221802 (2014)
Measurements of the γ*p → Δ reaction at low Q2
N. Sparveris et al.,
Measurement of the Neutron Electric to Magnetic Form Factor Ratio at Q2=1.58GeV2 Using the Reaction He-3(e,e'n)pp
B.S. Schlimme et al.
Phys. Rev. Lett. 111 (2013) 132504
Theoretical framework to analyze searches for hidden light gauge bosons in electron scattering fixed target experiments
T. Beranek, H. Merkel, M. Vanderhaeghen,
Strange hadronic physics in electroproduction experiments at the Mainz Microtron
P. Achenbach et al.,
Nucl. Phys. A881 (2012) 187-198
Exclusive electroproduction of K+Λ and K+Σ0 final states at Q2 = 0.030-0.055 (GeV/c)2
P. Achenbach et al.,
Characterisation and calibration of a scintillating fibre detector with > 4000 multi-anode photomultiplier channels
A. Esser et al.,
Nucl. Instr. Meth. Phys. Res. A 695 (2012) 334-337
Strange hadrons - strangeness in strongly interacting particles
P. Achenbach et al.
Eur. Phys. J. ST198 (2011) 307-327
Search for light gauge bosons of the dark sector at MAMI
H. Merkel et al.
Phys. Rev. Lett. 106 (2011) 251802
The RMS Charge Radius of the Proton and Zemach Moments
M.O. Distler, J.C. Bernauer, and T. Walcher,
Phys. Lett. B696 (2011) 343-347
Particle tracking in kaon electroproduction with cathode-charge sampling in multiwire proportional chambers
P. Achenbach et al.,
Nucl. Instr. Meth. Phys. Res. A 641 (2011) 105-113
High-precision determination of the electric and magnetic form factors of the proton
J.C. Bernauer et al.,
Phys. Rev. Lett. 105 (2010) 242001
First measurements of Λ and Σ0 hyperons in elementary electroproduction at MAMI
P. Achenbach et al.,
Nucl. Phys. A835 (2010) 313-316
A highly polarized He-3 target for the electron beam at MAMI
J. Krimmer et al.,
Nucl. Instrum. Meth. A611 (2009) 18-24
Noise and radiation damage in silicon photomultipliers exposed to electromagnetic and hadronic radiation
S. Sanchez Majos et al.,
Nucl. Instrum. Meth. A602 (2009) 506-510
Investigation of the Exclusive 3He(e,e'pn)p Reaction
D.G. Middleton et al.,
arXiv:0903.1215 [nucl-ex]
Phys. Rev. Lett. 103 (2009) 152501
Noise and radiation damage in silicon photomultipliers exposed to electromagnetic and hadronic radiation
S. Sanchez Majos et al.,
Nucl. Instr. Meth. Phys. Res. A 602 (2009) 506-510
Efficiency studies for a tracking detector based on square 1.5 m long scintillating fibers read out by SiPM
S. Sanchez Majos, P. Achenbach and J. Pochodzalla,
Nucl. Instr. Meth. Phys. Res. A 610 (2009) 502-508
Front-end electronics for the KAOS spectrometer at MAMI
P. Achenbach et al.,
IEEE Trans. Nucl. Sci. 56 (2009) 316-319
Front-end electronics for the Kaos spectrometer at MAMI
P. Achenbach et al.,
IEEE Trans. Nucl. Sci. 56 (2009) 316-319
Measurements of the γ* p → Δ Reaction At Low Q2: Probing the Mesonic Contribution
S. Stave et al.,
arXiv:0803.2476 [hep-ex]
Phys. Rev. C 78, 025209 (2008)
Virtual Compton Scattering measurements in the γ* N → Δ transition
N. F. Sparveris et al.,
arXiv:0804.1169 [nucl-ex],
Phys. Rev. C 78, 018201 (2008)
A New measurement of the structure functions PLL - PTT)/ epsilon and P_LT in virtual Compton scattering at Q2=0.33 (GeV/c)2
P. Janssens et al.,
arXiv:0803.0911, INSPIRE
Eur. Phys. J. A 37 (2008)
Separated cross sections in π0 electroproduction at threshold at Q^2 = 0.05 GeV^2/c^2
M. Weis et al.,
Eur. Phys. J. A 38 27-33 (2008)
Characterisation of radiation damage in silicon photomultipliers with a Monte Carlo model
S. Sanchez Majos, P. Achenbach and J. Pochodzalla,
Nucl. Instr. Meth. Phys. Res. A 594 (2008) 351-357
In-beam tests of scintillating fibre detectors at MAMI and at GSI
P. Achenbach et al.,
Nucl. Instr. Meth. Phys. Res. A 593 (2008) 353-360
Design criteria for multi-layered scintillating fibre arrays with inclined columns
P. Achenbach, L. Nungesser and J. Pochodzalla,
Nucl. Instr. Meth. Phys. Res. A 591 (2008) 406-410
Recoil polarization and beam-recoil double polarization measurement of η electroproduction on the proton in the region of the S11(1535) resonance
H. Merkel et al.,
Phys. Rev. Lett. 99, 132301 (2007)
Measurement of propagation time dispersion in a scintillator
P. Achenbach et al.,
Nucl. Instr. Meth. Phys. Res. A 578 (2007) 253-260
Determination of quadrupole strengths in the γ*p→Δ(1232) transition at Q2=0.20 (GeV/c)2
N.F. Sparveris et al.,
Phys. Lett. B 651, 102-107 (2007)
Beam-helicity asymmetry in photon and pion electroproduction in the Δ(1232)-resonance region at Q2 = 0.35(GeV/c)2
I. Bensafa et al.,
Eur. Phys. J. A 32, (2007) 69-75
First measurements of the 16O (e,e' pn) 14>N reaction.
D. G. Middleton et al.,
Eur. Phys. J. A29, 261-270, 2006
Monte Carlo simulation of virtual Compton scattering below pion
threshold
P. Janssens et al.,
Nucl. Instrum. Meth. A 566, 675-686 (2006)
Lowest Q2 measurement of the γ*p → Δ reaction: Probing the pionic contribution
S. Stave et al.,
nucl-ex/0604013,
Eur. Phys. J. A 30 (2006) 471-476
Measurement of the LT-asymmetry in π0 electroproduction at the energy of the Δ(1232) resonance
D. Elsner et al.,
nucl-ex/0507014,
Eur. Phys. J. A 27 (2006) 91-97
Measurement of the asymmetries in 3He→(e→,ep)d and 3He→(e→,ep)np
P. Achenbach et al.,
nucl-ex/0505012,
Eur. Phys. J. A 25 (2005) 177-183
Measurement of the electric form factor of the neutron at Q2 = 0.3-0.8 (GeV/c)2
D.I. Glazier et al.,
nucl-ex/0410026,
Eur. Phys. J. A 24 (2005) 101-109
Measurement of Rlt and Atl in the 4He(e,e'p)3H reaction at pmiss of 130-300 MeV/c
K. Aniol et al.,
nucl-ex/0408013,
Eur. Phys. J. A 22 (2004) 449-454
Measurement of the exclusive He3(e, e' p) reaction below the quasielastic peak
A. Kozlov et al.,
nucl-ex/0310021,
Phys. Rev. Lett. 93 (2004) 132301
Search for narrow nucleon resonances below pion threshold in the H(e,e'π+)X and D(e,e' p)X reactions
M. Kohl et al.,
nucl-ex/0304013,
Phys. Rev. C 67 (2003) 065204
The neutron charge form-factor and target analyzing powers from 3He→(e→,e' n) scattering
J. Bermuth et al.,
nucl-ex/0303015,
Phys. Lett. B 564 (2003) 199-204
Final state interaction effects in 3He→(e→,e'p)
C. Carasco et al.,
nucl-ex/0301016,
Phys. Lett. B 559 (2003) 41-48
A coherent interpretation of the form factors of the nucleon in terms of a pion cloud and constituent quarks
J. Friedrich and Th. Walcher,
Eur. Phys. J. A 17 (2003) 607-623
Self energies of the pion and the Δ isobar from the 3He(e,e'π+)3H reaction
M. Kohl et al.,
nucl-ex/0104004,
Phys. Lett. B 530 (2002) 67-73
Precise neutron magnetic form factors
G. Kubon et al.,
nucl-ex/0107016,
Phys. Lett. B 524 (2002) 26-32
Measurement of the beam-helicity asymmetry in the p(e→,e'p)π0 reaction at the energy of the Δ(1232) resonance
P. Bartsch et al.,
nucl-ex/0112009,
Phys. Rev. Lett. 88 (2002) 142001
A simple model to explain narrow nucleon resonances below the π threshold
Th. Walcher,
The focal plane proton-polarimeter of the 3-spectrometer setup at MAMI
Th. Pospischil et al.,
nucl-ex/0010007,
Nucl. Instr. Meth. Phys. Res. A 483 (2002) 713-725
Neutral pion threshold production at Q2=0.05 GeV2/c2 and Chiral Perturbation Theory
H. Merkel et al.,
nucl-ex/0108020,
Phys. Rev. Lett. 88 (2002) 012301
The horizontal drift chambers for the focal plane proton-polarimeter of the 3-spectrometer setup at MAMI
Th. Pospischil et al.,
Nucl. Instr. Meth. Phys. Res. A 483 (2002) 726-733
Measurement of GEp/GMp via polarization transfer at Q2 = 0.4 (GeV/c)2
Th. Pospischil et al.,
Eur. Phys. J. A 12 (2001) 125-127
A schematic model for narrow Δ(1232) resonances bound in a nucleus
Th. Walcher et al.,
Phys. Rev. C 63 (2001) 064605
Polarization transfer in the 4He(e→,e'p→)3H reaction
S. Dieterich et al.,
nucl-ex/0011008,
Phys. Lett. B 500 (2001) 47-52
Measurement of the recoil polarization in the p(e→,e'p→)π0 reaction at the Δ(1232) resonance
Th. Pospischil et al.,
nucl-ex/0010020,
Phys. Rev. Lett. 86 (2001) 2959-2962
Coherent π0 threshold production from the deuteron at q2 = -0.1 GeV2/c2
I. Ewald et al.,
nucl-ex/0010008,
Phys. Lett. B 499 (2001) 238-244
First determination of generalized polarizabilities of the proton by a virtual Compton scattering experiment
J. Roche et al.,
hep-ex/0007053,
Phys. Rev. Lett. 85 (2000) 708-711
A measurement of the axial form factor of the nucleon by the p(e,e'π+)n reaction at W=1125 MeV
A. Liesenfeld et al.,
nucl-ex/9911003,
Phys. Lett. B 468 (1999) 20-27
A polarization relation and the measurement of the longitudinal response in pseudoscalar meson electroproduction off the nucleon
H. Schmieden and L. Tiator,
nucl-th/9909046,
Eur. Phys. J. A 8 (2000) 15-17
QED radiative corrections to virtual Compton scattering
M. Vanderhaeghen et al.,
Measurement of the neutron electric form factor Gen at 0.67 (GeV/c)2 via 3He→(e→,e'n)
D. Rohe et al.,
Phys. Rev. Lett. 83 (1999) 4257-4260
High-precision studies of the 3He(e,e'p) reaction at the quasielastic peak
R.E.J. Florizone et al.,
nucl-ex/9908004,
Phys. Rev. Lett. 83 (1999) 2308-2311
Evidence for narrow ⏈(1232) states in the 12C(e,e'p π-)11C Reaction
P. Bartsch et al.,
Eur. Phys. J. A 4 (1999) 209-216
Proton polarization in the p(e→,e'p→)π0 reaction and the measurement of quadrupole components in the N to Δ transition
H. Schmieden,
nucl-th/9712057,
Eur. Phys. J. A 1 (1998) 427-433
Measurement of separated structure functions in the p(e,e'p)π0 reaction at threshold and chiral perturbation theory
M. O. Distler et al.,
Phys. Rev. Lett. 80 (1998) 2294-2297
Precise measurements of the neutron magnetic form factor
H. Anklin et al.,
Phys. Lett. B 428 (1998) 248-253
Large recoil momenta in the D(e,e'p)n reaction
K. I. Blomqvist et al.,
Phys. Lett. B 424 (1998) 33-38
Investigation of short-range nucleon-nucleon correlations using the reaction 12C(e,e'pp) in close to 4π geometry
K. I. Blomqvist et al.,
Phys. Lett. B 421 (1998) 71-78
The three-spectrometer facility at the Mainz microtron MAMI
K. I. Blomqvist et al.,
Nucl. Instr. Meth. Phys. Res. A 403 (1998) 263-301
Pion electroproduction in the 3He(e,e'π+)3H reaction at intermediate energies
K. I. Blomqvist et al.,
Nucl. Phys. A 626 (1997) 871-885
Precise pion electroproduction in the p(e,e'π+)n reaction at W=1125 MeV
K. I. Blomqvist et al.,
Z. Phys. A 353 (1996) 415-421
The pion is a constituent of the nucleon
Th. Walcher,
Nucl. Phys. A 606 (1996) 215-226
Forward-Angle 3He(e,e'π±) coincident electroproduction and the search for Delta's in the ground state of 3He
K. I. Blomqvist et al.,
Phys. Rev. Lett. 77 (1996) 2396-2399
High-momentum components in the 1p orbitals of 16O
K. I. Blomqvist et al.,
Phys. Lett. B 344 (1995) 85-90
No evidence for medium effects in 12C(e,e'p)11Bg.s. reaction
K. I. Blomqvist et al.,
Z. Phys. A 351 (1995) 353-354
An intensity distribution monitor for the 855 MeV cw MAMI electron beam
S. Schardt et al.,
Nucl. Instr. Meth. Phys. Res. A 355 (1995) 223-229
Model-independent separation of structure functions over
an extended kinematical region
Th. Veit et al.,
Z. Phys. A 349 (1994) 161-168
Optimization of complex experiments with respect to a maximum gain of information
Th. Veit, J. Friedrich and E.A.J.M. Offermann,
Comp. Phys. Comm. 82 (1994) 129-138
Backtracing particle rays through magnetic spectrometers: avoiding systematic errors in the reconstruction of target coordinates
Th. Veit, J. Friedrich and E.A.J.M. Offermann,
Nucl. Instr. Meth. Phys. Res. A 336 (1993) 572-582
Conference proceedings
Systematic studies of beam-normal single spin asymmetries at MAMI
M. Thiel et al.,
PoS SPIN2023, 25th International Spin Symposium (SPIN2023)
High-resolution hypernuclear decay pion spectroscopy at MAMI and future
S. Nagao et al.,
20th International Conference on Hadron Spectroscopy and Structure (HADRON2023)
High accuracy synchrotron radiation interferometry with relativistic electrons
P. Klag et al.,
13th Biennial Conference on Classical and Quantum Relativistic Dynamics of Particles and Fields (IARD 2022)
arXiv:2212.11139 [physics.ins-det] INSPIRE
J.Phys.Conf.Ser. 2482 (2023) 1, 012016
Commissioning of the hypertriton binding energy measurement at MAMI
P. Eckert et al.,
Proceedings 14th International Conference on Hypernuclear and Strange Particle Physics (HYP2022)
EPJ Web Conf. 271 (2022) 01006
Neutron form factor measurements at MAMI
B. S. Schlimme et al.,
Contribution to the Proceedings of the International Workshop on (e,e'p) Processes (EEP17), Bled, Slovenia, July 2-6, 2017
arXiv:2104.13849 [nucl-ex] INSPIRE
High-resolution decay-pion spectroscopy of Λ4H hypernuclei
P. Achenbach et al.,
Proceedings 12th International Conference on Hypernuclear and Strange Particle Physics (HYP2015),
Sendai, Japan, 7-12 Sept. 2015,
JPS Conf. Proc. 17 (2017) 011001
Charge symmetry breaking in light hypernuclei
P. Achenbach,
Proceedings 23rd European Conference on Few-Body Problems in Physics (EFB23),
Aarhus, Denmark, 8-12 August 2016,
Charge symmetry breaking in A=4 hypernuclei
P. Achenbach,
Proceedings 14th International Workshop on Production, Properties and Interactions of Mesons (MESON2016),
Cracow, Poland, 2 - 7 June 2016,
EPJ Web Conf. 130 (2016) 07001
Measurement of the Beam Normal Single-Spin Asymmetry of 12C
A. Esser, H. Merkel, M. Thiel, S. Schlimme, C. Sfienti,
Proceedings 54th International Winter Meeting on Nuclear Physics,
Bormio, Italy, 25-29 January 2016,
Deuteron form factor measurements at low momentum transfers
B. S. Schlimme et al.,
Proceedings 21st International Conference on Few-Body Problems in Physics (FB21),
Chicago, IL, USA, 18 - 22 May 2015,
EPJ Web Conf. 113 (2016) 04017
Experimental investigations of the hypernucleus Λ4H
P. Achenbach et al.,
Proceedings 21st International Conference on Few-Body Problems in Physics (FB21),
Chicago, IL, USA, 18 - 22 May 2015,
EPJ Web Conf. 113 (2016) 07001
From deep inside to outer space: exploring neutron skins
M. Thiel et al.,
Proceedings, 53rd International Winter Meeting on Nuclear Physics,
Bormio, Italy, 26-30 January, 2015
Progress of the Hypernuclear Decay Pion Spectroscopy Program at MAMI-C
Sho Nagao et al.,
Proceedings, 2nd International Symposium on Science at J-PARC: Unlocking the Mysteries of Life, Matter and the Universe (J-PARC 2014) : Tsukuba, Japan, July 12-15, 2014
JPS Conf. Proc. 8 (2015) 021012
On the Binding Energies of Λ-Hyperons in Hyperhydrogen
P. Achenbach, J. Pochodzalla, F. Schulz,
Proceedings 20th International Conference on Particles and Nuclei (PANIC14),
Hamburg, Germany, 24 - 29 Aug. 2014,
DESY Conference Proceedings 2014-04 (2014) 695
Kaon Tagging at 0o Scattering Angle for High-Resolution Decay-Pion Spectroscopy
A. Esser,
Proceedings 25th International Nuclear Physics Conference (INPC 2013),
Florence, Italy, 2 - 7 Jun. 2013,
Initial state radiation experiment at MAMI
M. Mihovilovic et al.,
Proceedings, International Symposium on Lepton and Hadron Physics at Meson-Factories (LHPMF 2013) : Messina, Italy, October 13-15, 2013
Recent Studies of the Strangeness Physics at MAMI-C
Kyo Tsukada et al.,
Proceedings, 12th Asia Pacific Physics Conference (APPC12) : Makuhari Messe, Japan, July 14-19, 2013
JPS Conf. Proc. 1 (2014) 013045
Hypernuclear Decay Pion Spectroscopy at Mainz Microtron
Sho Nagao, P. Achenbach, et al.,
Proceedings, 12th Asia Pacific Physics Conference (APPC12) : Makuhari Messe, Japan, July 14-19, 2013
JPS Conf.Proc. 1 (2014) 013079
Recent Studies of Hypernuclei Formation with Electron Beams at MAMI
P. Achenbach et al.,
Proceedings 22nd European Conference on Few-Body Problems in Physics (EFB22),
Cracow, Poland, 9 - 13 Sept. 2013,
Searches for dark photons at the Mainz Microtron
H. Merkel et al.,
Workshop to Explore Physics Opportunities with Intense, Polarized Electron Beams up to 300 MeV, 143-146
AIP Conf. Proc. 1563, 143–146 (2013)
Decay pion spectroscopy of electroproduced hypernuclei
K. Tsukada et al.,
Proceedings 5th Asia-Pacific Conference on Few-Body Problems in Physics (APFB2011),
Seoul, Korea, 22 - 26 Aug. 2011,
Overview of the electromagnetic production of strange mesons at MAMI
P. Achenbach et al.,
Proceedings, 11th International Conference on Hypernuclear and Strange Particle Physics (HYP 2012) : Barcelona, Spain, October 1-5, 2012
Prospects for hypernuclear physics at Mainz: From KAOS@MAMI to PANDA@FAIR
A. Esser et al.,
Proceedings, 11th International Conference on Hypernuclear and Strange Particle Physics (HYP 2012) : Barcelona, Spain, October 1-5, 2012
Nucl.Phys.A 914 (2013) 519-529
High precision mass measurements of hypernuclei achievements and perspectives
A. Esser et al.,
Proceedings of Xth Quark Confinement and the Hadron Spectrum - PoS (Confinement X)
Proceedings of Science Vol. 171 (2013)
The frontiers of the virtual photon program at MAMI
C. Sfienti et al.,
Proceedings 12th International Workshop on Production, Properties and Interactions of Mesons (MESON2012),
Cracow, Poland, 31 May - 5 June 2012,
Unpolarized and polarized elementary kaon electroproduction cross sections measured at MAMI
P. Achenbach et al.,
Proceedings 12th International Workshop on Production, Properties and Interactions of Mesons (MESON2012),
Cracow, Poland, 31 May - 5 June 2012,
Measurement of the neutron electric form factor GEn in the reaction 3He(pol)-3 (e(pol), e'n)
B.S. Schlimme,
Proceedings 6th International Conference on Quarks and Nuclear Physics (QNP 2012),
Palaiseau, France, 16-20 Apr 2012,
Search for the dark matter gauge bosons at the Mainz Microtron
H. Merkel et al.,
Proceedings 50th International Winter Meeting on Nuclear Physics Bormio, Italy, January 23-27 2012,
Measurement of the neutron electric form factor in quasielastic electron scattering
B.S. Schlimme,
Proceedings 50th International Winter Meeting on Nuclear Physics,
Bormio, Italy, 23-27 January 2012,
Pioneering experiment for high resolution decay pion spectroscopy of light hypernuclei at MAMI
A. Esser et al.,
Proceedings 50th International Winter Meeting on Nuclear Physics,
Bormio, Italy, 23-27 January 2012,
Development of a neutron detector for A1@MAMI
M. Thiel and M. Schoth,
Proceedings 50th International Winter Meeting on Nuclear Physics,
Bormio, Italy, 23-27 January 2012,
A large-scale FPGA-based trigger and dead-time free DAQ system for the Kaos spectrometer at MAMI
P. Achenbach et al.,
Proceedings IEEE Real Time Conference 2010 (RT2010),
Lisbon, Protugal, 24-28 May 2010,
IEEE Trans. Nucl. Sci. 58 (2011) 1677-1684
Hypernuclear spectroscopy with electron beams
P. Achenbach,
Proceedings XLIX International Winter Meeting on Nuclear Physics,
Bormio, Italy, 24-28 January 2011,
Measurement of the neutron electric form factor in the reaction 3He(e,e'n)pp at MAMI
B.S. Schlimme,
Proceedings 19th International Spin Physics Symposium (SPIN2010)
J. Phys. Conf. Ser. 295 012108
Strangeness physics at MAMI: First results and perspectives
P. Achenbach,
Proceedings 3rd International Conference on Nuclear and Particle Physics with CEBAF at Jefferson Lab,
Dubrovnik, Croatia, 3 - 8 October 2010,
Fizika B 20 (2011) 107-116
Current Issues in Kaon Photoelectro-Production of the Nucleon
P. Achenbach,
Proceedings XLVIII International Winter Meeting on Nuclear Physics,
Bormio, Italy, 25-29 January 2010,
PoS BORMIO2010 048
Associated Λ/Σ0 electroproduction with the Kaos spectrometer at MAMI
P. Achenbach,
Proceedings 19th International IUPAP Conference on Few-Body
Problems in Physics, Bonn, 31 August - 5 September 2009,
EPJ Web Conf. 3 (2010) 07010
First measurements of Λ and Σ0 hyperons in elementary electroproduction at MAMI
P. Achenbach et al.,
Proceedings 10th International Conference on Hypernuclear and Strange Particle Physics, Tokai, Japan, 14-18 September 2009
Nucl. Phys. A 835 (2010) 313-316
Strangeness physics with Kaos at MAMI
P. Achenbach,
Proceedings XLVII International Winter Meeting on Nuclear Physics,
Bormio, Italy, 26-30 January 2009, Italian Physical Society Conference Proceedings 99 (2009) 1-6,
Status of strangeness electro-production at MAMI
P. Achenbach,
Proceedings International Symposium on Strangeness in Nuclear and Hadronic Systems (Sendai08),
Sendai, Japan, 15-18 December 2008, 332-339
Int. J. Mod. Phys. E 19 (2010) 2624-2631
Physics of hypernuclei as seen by an experimenter
P. Achenbach,
Proceedings Mini-Workshop on Few-Quark States
and the Continuum, Bled, Slovenia, 15-22 September 2008,
Bled Workshops in Physics 9 (2008) 1-8
A tracking fiber detector based on silicon photomultipliers for the Kaos spectrometer
S. Sanchez Majos, P. Achenbach and J. Pochodzalla,
Proceedings IEEE Nuclear Science Symposium 2008 (NSS08), Dresden, 20-24 October 2008
Proceedings IEEE Nuclear Science Symposium 2008 (NSS08)
Future use of silicon photomultipliers for Kaos at MAMI and Panda at FAIR
P. Achenbach, A. Sanchez Lorente, S. Sanchez Majos and J. Pochodzalla,
Proceedings Conference on New Developments in Photodetection (NDIP08), Aix-les-Bains, France,
15-20 June 2008,
Nucl. Instr. Meth. Phys. Res. A 610 (2009) 358-361
The physics program at MAMI-C
P. Achenbach,
Jülich, 10-14 September 2007, 111
Proceedings 11th International Conference on
Meson-Nucleon Physics and the Structure of the Nucleon (MENU 2007)
Experiments on few-nucleon systems at MAMI
M.O. Distler,
Proceedings of the 20th European Conference on Few-Body Problems in Physics (EFB20), Pisa, Italy, 10-14 September 2007,
Probing hypernuclei at PANDA and at MAMI-C
P. Achenbach,
Proceedings 9th International Conference on
Hypernuclear and Strange Particle Physics (HYP 2006),
Mainz, 10-14 October 2006, 79-84
New detectors for the kaon and hypernuclear experiments with Kaos at MAMI and with PANDA at GSI
P. Achenbach et al.,
Proceedings International Symposium on Detector Development for Particle, Astroparticle and Synchrotron Radiation Experiments (SNIC 2006), Menlo Park, California, 3-6 April 2006, 144
Future hypernuclear physics at MAMI-C and PANDA-GSI
J. Pochodzalla,
Proceedings 8th International Conference on Hypernuclear and Strange Particle Physics (HYP 2003), Newport News, Virginia, 14-18 October 2003,
Nucl. Phys. A 754 (2005) 430-442
Kaon electroproduction with Kaos at MAMI-C
P. Achenbach,
Proceedings XXXII International Workshop on Gross Properties of Nuclei and Nuclear Excitations, Hirschegg, Austria,
11-17 Januar 2004, 137-142
Measurement of the electric form factor of the neutron at MAMI
M. Seimetz,
Proceedings 10th International Conference on the Structure of Baryons (Baryons 04), Palaiseau, France, 25-29 October 2004,
Revisiting the axial form factor of the nucleon from low Q² pion electroproduction
U. Müller and M. Potokar,
Proceedings PANIC02 XVI International Conference on Particles and Nuclei, Osaka, Japan, 30 September - 4 October 2002,
Highlights and perspectives of the Mainz Microtron MAMI
Th. Walcher,
Proceedings International School on Nuclear Physics,
Erice, Sicily, 16-24 September 2002
Prog. Part. Nucl. Phys.
50 (2003) 503-522
Measurement of the neutron electric form factor
U. Müller and M. Seimetz,
Proceedings International School on Nuclear Physics, Erice, Sicily, 16-24 September 2002,
Measurement of the electric form factor of the neutron at MAMI
M. Seimetz,
Proceedings Spin 2002, Brookhaven National Laboratory, Upton, NY, September 2002,
Measurement of the electric form factor of the neutron at Q2 = 0.6 - 0.8 (GeV/c)2
M. Seimetz,
Proceedings Baryons 2002, Newport News,
Pion electroproduction at threshold
H. Merkel,
MENU 2001, Washington, πN Newsletter 16, 25-30 (2001),
π0 electroproduction in the Δ(1232) region at MAMI
H. Schmieden,
NSTAR2001, Mainz,
Electromagnetic form factors of the neutron
H. Schmieden,
NPC 2001, Berkeley,
Status and prospects of the (e,e'NN) experiments at MAMI
Michael O. Distler,
submitted to 5th Workshop on e-m inducedm Two-Hadron Emission, Lund 2001,
Data acquisition and analysis for the 3-spectrometer-setup at MAMI
Michael O. Distler, Harald Merkel, Markus Weis,
Proceedings of the 12th IEEE Real Time Congress on Nuclear and Plasma Sciences, Valencia, June 2001
The longitudinal and transverse response of the 4He(e,e'p) reaction in the dip region
A. Kozlov et al.,
Proceedings of the XVI th IUPAP International Conference on Few-Body Problems in Physics, Taipei, Taiwan, March 6-10, 2000,
Nucl. Phys. A 684 (2001) 460-463
Medium effects in pion electroproduction off 3He
M. Kohl et al.,
Proceedings of the XVI th IUPAP International Conference on Few-Body Problems in Physics, Taipei, Taiwan, March 6-10, 2000,
Nucl. Phys. A 684 (2001) 454c-456c
Medium modifications in pion electroproduction off 3He
A. Richter,
International Workshop XXVIII on Gross Properties of Nuclei and Nuclear Excitations, Hirschegg Jan. 16th-22nd 2000,
Threshold electro production of neutral pions at low q2 off the proton and off the deuteron
H. Merkel et al.,
Prog. Part. Nucl. Phys. 44 (2000) 433-438
Probing short-range nucleon-nucleon correlations with virtual photons at MAMI
G. Rosner et al.,
Particle tracking in kaon electroproduction with cathode-charge sampling in multiwire proportional chambers
P. Achenbach et al.,
arXiv:1104.4254, INSPIRE
Nucl. Instr. Meth. Phys. Res. A 641 (2011) 105-113
Prog. Part. Nucl. Phys. 44 (2000) 99
The first virtual Compton scattering experiment at MAMI
S. Kerhoas et al.,
Nucleon 99, Frascati, Italy,
Nucl. Phys. A 666-667 (2000) 44-47
The first dedicated Virtual Compton Scattering experiment at MAMI
J.M. Friedrich et al.
15th International Conference on Particles and Nuclei (PANIC 99)
INSPIRE
Nucl.Phys.A 663 (2000) 389-392
Virtual Compton Scattering under π0 threshold at Q2=0.33GeV2. Preliminary results
J. Roche et al.,
Nuclear Physics A 654 (1999) 547c-551c
Double polarization experiments at intermediate energy
H. Schmieden,
Proc. PANIC'99, Uppsala (1999),
Investigation of short-range nucleon-nucleon correlations at MAMI
G. Rosner,
Proc. 10th Mini-Conference on Studies of Few-Body Systems with High Duty-Factor Electron Beams, NIKHEF, Amsterdam (1999)
Measurement of the recoil proton polarization in the p(e→,e'p→)π0 reaction at W=1232MeV
P. Bartsch,
Proceedings Baryons, Bonn 1998,
Measurements of neutron electromagnetic form factors
J. Jourdan,
Proceedings INPC, Paris 1998,
Form factors of the neutron
H. Schmieden,
Proceedings Baryons, Bonn 1998,
Short-range correlations studied in (e,e'pp) reactions at MAMI
G. Rosner,
Proceedings Workshop on Electron-Nucleus Scattering, Elba 1998,
Meson photo- and electroproduction at MAMI
H. Merkel,
Proceedings Mesons & Light Nuclei '98, World Sci. Pub., ISBN 981-02-3885-1,
Double polarized neutron form factor measurement at high Q2 via 3He(e,e'n) with the spectrometer facility at the Mainz Microtron
J. Bermuth,
Proceedings Spin '98,
Experiments on threshold pion electroproduction
H. Merkel,
Proceedings of Chiral Dynamics: Theory and Experiment, Mainz 1997,
Lect. Notes in Phys. 513 (1998) 114-123,
Short-range nucleon-nucleon correlations investigatedin 12C(e,e'pp) 10Be and 16O(e,e'pp) 14C
G. Rosner,
Proc. Conf. on Perspectives in Hadronic Physics, Trieste 1997, World Scientific,
Threshold π0 electro production at MAMI
H. Merkel,
Proc. of PANIC '96, World Scientific (1997) 255-256
Polarized high pressure 3He Target at MAMI
D. Rohe et al.,
Workshop on polarized targets and beams, Champaign 1997
Photo- and electro-pion production off the nucleon Experiment
Th. Walcher,
The Mainz Microtron: A status report
W. Boeglin,
Experiments on one and two-proton knock-out at MAMI
G. Rosner,
An experiment on the electroproduction of multi-hadron final states
G. Rosner,