A microscope for the Glasgow photon tagging spectrometer in Mainz

Reiter, Andreas; Lumsden, P.; Ahrens, J.; Annand, J. R. M.; Beck, R.; McGeorge, J. C.; Owens, R.O.

doi:10.1140/epja/i2006-10130-9

Cited by 13 publications

(27 citation statements)

References 13 publications

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“…In the analysis of an experiment with the tagger it is necessary to know the energy of the tagging electrons which in experiments which use the focal plane microscope [6] where the channel width is ∼2 mm along the focal plane.…”

Section: Tagger Energy Calibrationmentioning

confidence: 99%

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Upgrade of the Glasgow photon tagging spectrometer for Mainz MAMI-C

et al. 2008

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Section: Tagger Energy Calibrationmentioning

confidence: 99%

“…Improved resolution over part of the energy range was provided by a 96-element focal plane microscope [6]. Using an aligned diamond radiator tagged photons with linear polarisation greater than 45% have been produced [7,8,9,10,11] over an adjustable part of the energy range up to ∼400 MeV.…”

Section: Introductionmentioning

confidence: 99%

Upgrade of the Glasgow photon tagging spectrometer for Mainz MAMI-C

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“…The photon energies were determined using the Glasgow photon tagging spectrometer (tagger) [14,15], which provided a tagged photon flux of roughly 10 5 s −1 MeV −1 at a beam current of about 35 nA. For the first time the tagger focal-plane microscope detector [16] was used to improve the tagged photon energy resolution. The microscope detector was placed in front of the main focal-plane spectrometer (see Fig.…”

Section: Determination Of the Dalitz Plot Parameter α And Precise Meamentioning

confidence: 99%

Study of QCD-dynamics inηandη′production and decays

Beck

Wiedner

2017

EPJ Web Conf.

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Abstract. One aim of this project lies in studying QCD dynamics using photoproduction of η and η mesons with the CBELSA/TAPS experiment at the accelerator facility ELSA. Hadronic decay modes of η and η are analyzed that allow the study of symmetry breaking effects in QCD. Furthermore, excited η-states produced with a photon beam are studied within the scope of this project. Of special interest is hereby the nature of the η(1405). The high data samples for η-and η -photoproduction off the proton allow in addition the determination of polarization observables.

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“…The threshold for K' decay is E J =1.447 and one of the main aims of the EPT is to carry out detailed studies of K' decay modes [6]. For high-resolution studies a "microscope" detector [7], consisting of 96 2x3 mm 2 cross-section scintillating fibres, coupled to six multi-anode PMTs, has been constructed (see figure 2). The microscope is located immediately in front of the tagger FPD.…”

Section: The Glasgow-mainz Photon Taggermentioning

confidence: 99%

“…The quark model that predicts the N * (1685) states that excitation of the resonance on the proton would require explicit SU(3) symmetry breaking, with a strength that depends linearly on the strange current quark mass [24]. In order to investigate the proton channel with high resolution an experiment [25,26] was carried out using the tagger microscope [7] and a liquid hydrogen target. Kmesons were selected using a 3V cut on the invariant masses of all 2J-decay events.…”

Section: K K Photoproductionmentioning

confidence: 99%

Research with real photons at the MAMI 1.6 GeV electron accelerator

MacGregor

2014

EPJ Web of Conferences

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Abstract. The A2-CB Collaboration at Mainz is studying the structure of hadrons by meson photoproduction using unpolarised, linearly polarised and circularly polarised photons with energies up to 1.6 GeV. Photons are energy-tagged using the Glasgow-Mainz tagged photon spectrometer and a new high-energy end-point tagger which allows K' reactions to be studied. Reaction products are detected in a ~4S detector consisting of the Crystal Ball detector and TAPS forward wall. Transverse or longitudinally polarised proton targets are available and new techniques have been developed to measure the polarisation of recoiling protons. These facilities have allowed an extensive programme of double-polarisation meson-photoproduction experiments to be carried out to search for so-called "missing baryon resonances" on proton and deuteron targets. Searches have also been carried out to investigate narrow resonances in the K-photoproduction channel at invariant masses around 1680 MeV. Coherent S 0 production measurements have been used to estimate the neutron skin thickness in 208 Pb. This paper presents selected highlights from the A2-CB collaboration research programme at MAMI.

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A microscope for the Glasgow photon tagging spectrometer in Mainz

Cited by 13 publications

References 13 publications

Upgrade of the Glasgow photon tagging spectrometer for Mainz MAMI-C

Upgrade of the Glasgow photon tagging spectrometer for Mainz MAMI-C

Study of QCD-dynamics inηandη′production and decays

Research with real photons at the MAMI 1.6 GeV electron accelerator

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