A large volume 3D imaging gas scintillation counter with CsI-based wire chamber readout

Bräuning, H.; Breskin, A.; Chechik, R.; Dangendorf, V.; Demian, A.; Ullmann, K.; Schmidt‐Böcking, H.

doi:10.1016/0168-9002(94)90734-x

Cited by 15 publications

(6 citation statements)

References 12 publications

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“…It should be noted that proportional scintillations and electron avalanching in liquid Xe were successfully observed earlier in proportional counters [31] and micro-strip plates [32]. Also, earlier works on the hybrid gas detectors, recording avalanche and proportional scintillations using gas detectors sensitive in the VUV region [33], [34], [35], might be useful for the development of the Photoelectric Gate.…”

Section: Photoelectric Gate With Electroluminescence Gapmentioning

confidence: 72%

Electric and Photoelectric Gates for ion backflow suppression in multi-GEM structures

Bondar

2006

J. Inst.

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A new approach to suppress ion backflow in multi-GEM structures is suggested. In this approach, the potential difference applied across the gap between two adjacent GEMs is reversed compared to the standard configuration. In such a gap structure, called Electric Gate, a signal transfer from the first to second GEM is presumably provided by the small residual field still existing at small gate voltages and connecting the holes of the two GEMs. On the other hand, ion backflow between the GEMs turned out to be substantially reduced. We also consider another configuration, called Photoelectric Gate, in which in addition to the Electric Gate configuration, a CsI photocathode is deposited on the second GEM. In the Photoelectric Gate, ion backflow through the gap is fully suppressed and the signal transfer through the gap is provided by the photoelectric mechanism due to either avalanche scintillations in the first GEM or proportional scintillations in the electroluminescence gap replacing the first GEM. The idea of the Electric Gate might find applications in the field of TPC detectors and gas photomultipliers. The idea of the Photoelectric Gate is more relevant in the field of two-phase avalanche detectors.

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Section: Photoelectric Gate With Electroluminescence Gapmentioning

confidence: 72%

Electric and Photoelectric Gates for ion backflow suppression in multi-GEM structures

Bondar

2006

J. Inst.

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“…One main challenge in realizing a large-area UV-sensitive readout for the xenon scintillator is the pressure difference between the scintillator and the UV-detector volumes and the necessity to use adequately thin quartz windows to minimize absorption losses. The technical requirements for a detector with 25-bar xenon and 200-mm active diameter as described in [3] negatively influence the energy and position resolution.…”

Section: B Uv-light Readoutmentioning

confidence: 99%

“…Many high-energy physics experiments require large-area detectors with a high spatial and energy resolution. One example is a proposed atomic collision experiment, at the GSI in Darmstadt (Germany), where close ion-atom collisions with very heavy, highly charged slow ions like Pb or U are investigated [2], [3]. In these collisions, X-rays are emitted from quasi-molecular states of the projectile-target system at small internuclear distances.…”

Section: Introductionmentioning

confidence: 99%

Studies of an integrated photosensor and imaging optics to readout the light from gas scintillation proportional counters

Nickles

Bräuning²,

Bräuning‐Demian³

et al. 2002

IEEE Trans. Nucl. Sci.

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Medical applications and many atomic collision experiments require energy, position, and time resolving X-ray detectors with large active volume, in the energy range from 5 to over 500 keV. We report on the improvements in the readout of a high-pressure xenon-filled gas scintillation proportional counter. The implementation of an imaging optic for the ultrviolet (UV)-scintillation light has improved the position resolution by more than 30%. Microstructure devices such as the gas electron multiplier (GEM) allow the use of a multistep UV-photon detector inside the pure noble gas environment to simplify the detector setup and improve the long-term stability.

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“…While the radiation-induced primary-and secondary-scintillation light in noble-liquid detectors is detected with dedicated costly vacuum photomultipliers [1], there have been attempts to develop gaseous photomultipliers (GPM [6]) capable of operation at cryogenic temperatures and of large-area coverage [7][8] [9]. Room-temperature GPMs with CsI photocathodes coupled to wire chambers have been proposed and investigated for recording Xe scintillation light [10] [11]. Our "3 imaging" detection concept consists of a 3D localization of a (  , ) emitter, 44 Sc, by intersecting the line-of-response (LOR) annihilation gamma rays (in a PET) with the direction of the third gamma ray (of 1,157 MeV) measured with a LXe Compton Telescope [5].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

On the operation of a micropattern gaseous UV-photomultiplier in liquid-Xenon

Duval¹,

Breskin²,

Budnik³

et al. 2011

J. Inst.

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Operation results are presented of a UV-sensitive gaseous photomultiplier (GPM) coupled through a MgF 2 window to a liquid-xenon scintillator. It consisted of a reflective CsI photocathode deposited on top of a THick Gaseous Electron Multiplier (THGEM); further multiplication stages were either a second THGEM or a Parallel Ionization Multiplier (PIM) followed by a MICROMEsh GAseous Structure (MICROMEGAS). The GPM operated in gasflow mode with non-condensable gas mixtures. Gains of 10 4 were measured with a CsI-coated double-THGEM detector in Ne/CH 4 (95:5), Ne/CF 4 (95:5) and Ne/CH 4 /CF 4 (90:5:5), with soft X-rays at 173 K. Scintillation signals induced by alpha particles in liquid xenon were measured here for the first time with a double-THGEM GPM in He/CH 4 (92.5:7.5) and a triple-structure THGEM/PIM/MICROMEGAS GPM in Ne/CH 4 (90:10) with a fast-current preamplifier.

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A large volume 3D imaging gas scintillation counter with CsI-based wire chamber readout

Cited by 15 publications

References 12 publications

Electric and Photoelectric Gates for ion backflow suppression in multi-GEM structures

Electric and Photoelectric Gates for ion backflow suppression in multi-GEM structures

Studies of an integrated photosensor and imaging optics to readout the light from gas scintillation proportional counters

On the operation of a micropattern gaseous UV-photomultiplier in liquid-Xenon

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