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The high voltage system for the novel MPGD-based photon detectors of COMPASS RICH-1
/ Agarwala, J. (INFN, Trieste) ; Birsa, R. (INFN, Trieste) ; Bradamante, F. (INFN, Trieste ; Trieste U.) ; Bressan, A. (INFN, Trieste ; Trieste U.) ; Chatterjee, C. (Trieste U. ; INFN, Trieste) ; Ciliberti, P. (INFN, Trieste ; Trieste U.) ; Dalla Torre, Silvia (INFN, Trieste) ; Dasgupta, S. (INFN, Trieste ; Trieste U.) ; Gobbo, B. (INFN, Trieste) ; Gregori, M. (INFN, Trieste) et al.
The architecture of the novel MPGD-based photon detectors of COMPASS RICH-1 consists in a large-size hybrid MPGD multilayer layout combining two layers of Thick-GEMs and a bulk resistive MICROMEGAS. Concerning biasing voltage, the Thick-GEMs are segmented in order to reduce the energy released in case of occasional discharges, while the MICROMEGAS anode is segmented in pads individually biased at positive voltage, while the micromesh is grounded. [...]
arXiv:1803.01667; AIDA-2020-CONF-2018-009
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Geneva : SISSA, 2018-11-19 - 6 p.
- Published in : PoS MPGD2017 (2019) 053
Fulltext: AIDA-2020-CONF-2018-009 - PDF; PoS(MPGD2017)053 - PDF; 1803.01667 - PDF;
In : 5th International Conference on Micro-Pattern Gas Detectors, Philadelphia, Pennsylvania, Pa, Usa, 22 - 26 May 2017, pp.053
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2.
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The novel photon detectors based on MPGD technologies for the upgrade of COMPASS RICH-1
/ Agarwala, J. (INFN, Trieste ; ICTP, Trieste) ; Alexeev, M. (INFN, Turin ; Turin U.) ; Azevedo, C.D.R. (Aveiro U.) ; Birsa, R. (INFN, Trieste) ; Bradamante, F. (INFN, Trieste ; U. Trieste (main)) ; Bressan, A. (INFN, Trieste ; U. Trieste (main)) ; Chatterjee, C. (INFN, Trieste ; U. Trieste (main)) ; Chiosso, M. (INFN, Turin ; Turin U.) ; Cicuttin, A. (INFN, Trieste ; ICTP, Trieste) ; Ciliberti, P. (INFN, Trieste ; U. Trieste (main)) et al.
The RICH-1 Detector of the COMPASS experiment at CERN SPS has undergone an important upgrade in 2016. Four new photon detectors, based on MPGD technology and covering a total active area larger than 1.2~m2 have replaced the previously used MWPC-based photon detectors. [...]
arXiv:1804.05765; AIDA-2020-CONF-2018-008
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Geneva : SISSA, 2018-04-13 - 7 p.
- Published in : PoS MPGD2017 (2019) 052
Fulltext: PoS(MPGD2017)052 - PDF; AIDA-2020-CONF-2018-008 - PDF; 1804.05765 - PDF;
In : 5th International Conference on Micro-Pattern Gas Detectors, Philadelphia, Pennsylvania, Pa, Usa, 22 - 26 May 2017, pp.052
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3.
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Status of COMPASS RICH-1 Upgrade with MPGD-based Photon Detectors
/ Tessarotto, F. (INFN, Trieste) ; Alexeev, M. (INFN, Turin) ; Birsa, R. (INFN, Trieste) ; Bradamante, F. (INFN, Trieste ; U. Trieste (main)) ; Bressan, A. (INFN, Trieste ; U. Trieste (main)) ; Chiosso, M. (INFN, Turin ; U. Turin (main)) ; Ciliberti, P. (INFN, Trieste ; U. Trieste (main)) ; Dalla Torre, S. (INFN, Trieste) ; Dasgupta, S. (INFN, Trieste ; U. Trieste (main)) ; Denisov, O. (INFN, Turin) et al.
A Set of new MPGD-based Photon Detectors is being built for the upgrade of COMPASS RICH-1. The detectors cover a total active area of 1.4 m$^2$ and are based on a hybrid architecture consisting of two THGEM layers and a Micromegas. [...]
arXiv:1710.09274.-
2018 - 5 p.
- Published in : EPJ Web Conf. 174 (2018) 01004
Fulltext: epjconf_mpgd2018_01004 - PDF; arXiv:1710.09274 - PDF; External links: 00003 Rate of discharges in THGEMs as function of the bias voltage in Ar/CO$_2$ 70/30 gas mixture.; 00000 Artistic view of the COMPASS RICH-1 detector (left) and exploded view of the new PDs (right); 00002 Schematic section of the hybrid module (not in scale).; 00004 A THGEM in its handling frame (left) and inside the CsI deposition plant (right).; 00005 A THGEM in its handling frame (left) and inside the CsI deposition plant (right).; 00001 Artistic view of the COMPASS RICH-1 detector (left) and exploded view of the new PDs (right)
In : 4th International Conference on Micro Pattern Gaseous Detectors - MPGD2015, Trieste, Italy, 12 - 15 Oct 2015, pp.01004
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4.
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Light isovector resonances in $\pi^- p \to \pi^-\pi^-\pi^+ p$ at 190 GeV/${\it c}$
/ COMPASS Collaboration
We have performed the most comprehensive resonance-model fit of $\pi^-\pi^-\pi^+$ states using the results of our previously published partial-wave analysis (PWA) of a large data set of diffractive-dissociation events from the reaction $\pi^- + p \to \pi^-\pi^-\pi^+ + p_\text{recoil}$ with a 190 GeV/$c$ pion beam. The PWA results, which were obtained in 100 bins of three-pion mass, $0.5 < m_{3\pi} < 2.5$ GeV/$c^2$, and simultaneously in 11 bins of the reduced four-momentum transfer squared, $0.1 < t' < 1.0$ $($GeV$/c)^2$, are subjected to a resonance-model fit using Breit-Wigner amplitudes to simultaneously describe a subset of 14 selected waves using 11 isovector light-meson states with $J^{PC} = 0^{-+}$, $1^{++}$, $2^{++}$, $2^{-+}$, $4^{++}$, and spin-exotic $1^{-+}$ quantum numbers. [...]
arXiv:1802.05913; CERN-EP-2018-021.-
Geneva : CERN, 2018-11-02 - 72 p.
- Published in : Phys. Rev. D 98 (2018) 092003
Article from SCOAP3: PDF; Draft (restricted): PDF; Fulltext: CERN-EP-2018-021 - PDF; 1802.05913 - PDF;
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5.
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Transverse extension of partons in the proton probed in the sea-quark range by measuring the DVCS cross section
/ COMPASS Collaboration
We report on the first measurement of exclusive single-photon muoproduction on the proton by COMPASS using 160 GeV/$c$ polarized $\mu^+$ and $\mu^-$ beams of the CERN SPS impinging on a liquid hydrogen target. We determine the dependence of the average of the measured $\mu^+$ and $\mu^-$ cross sections for deeply virtual Compton scattering on the squared four-momentum transfer $t$ from the initial to the final final proton. [...]
arXiv:1802.02739; CERN-EP-2018-016.-
Geneva : CERN, 2019-06-10 - 7 p.
Article from SCOAP3: PDF; Draft (restricted): PDF; Fulltext: 1802.02739 - PDF; CERN-EP-2018-016 - PDF; Fulltext from publisher: PDF;
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6.
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Novel MPGD based Detectors of Single Photons in COMPASS RICH-1
/ Alexeev, J. Agarwala M. ; Azevedo, C.D.R. (Aveiro U.) ; Birsa, R. (INFN, Trieste) ; Bradamante, F. (INFN, Trieste ; Trieste U.) ; Bressan, A. (INFN, Trieste ; Trieste U.) ; Buchele, M. (Freiburg U.) ; Chatterjee, C. (Matrivani Inst., Calcutta) ; Chiosso, M. (INFN, Turin ; Turin U.) ; Ciliberti, P. (INFN, Trieste ; Trieste U.) ; Dalla Torre, S. (INFN, Trieste) et al.
COMPASS is a fixed target experiment at CERN SPS aimed to study Hadron Structure and Spectroscopy. [...]
arXiv:1710.08656.
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2017. - 4 p.
Full text - Full text
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7.
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8.
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Hybrid MPGD-based detectors of single photons for the upgrade of COMPASS RICH-1
/ Alexeev, M (INFN, Turin ; Dubna, JINR) ; Birsa, R (INFN, Trieste) ; Bradamante, F (INFN, Trieste ; Trieste U.) ; Bressan, A (INFN, Trieste ; Trieste U.) ; Chiosso, M (INFN, Turin ; Turin U.) ; Ciliberti, P (INFN, Trieste ; Trieste U.) ; Dalla Torre, S (INFN, Trieste) ; Dasgupta, S (INFN, Trieste ; Trieste U.) ; Denisov, O (INFN, Turin) ; Finger, M (Charles U. ; Dubna, JINR) et al.
A seven year-long R&D; programme has been performed and the resulting detector architecture is a hybrid MPGD including two THick GEM (THGEM) multiplication stages followed a MICROMEGAS. The first THGEM board forms the photocathode support: its upper face is CsI coated. [...]
2016 - 5 p.
- Published in : 10.1109/NSSMIC.2015.7581949
In : 2015 IEEE Nuclear Science Symposium and Medical Imaging Conference, San Diego, CA, USA, 31 Oct - 7 Nov 2015, pp.7581949
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10.
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Transverse-momentum-dependent Multiplicities of Charged Hadrons in Muon-Deuteron Deep Inelastic Scattering
/ COMPASS Collaboration
A semi-inclusive measurement of charged hadron multiplicities in deep inelastic muon scattering off an isoscalar target was performed using data collected by the COMPASS Collaboration at CERN. The following kinematic domain is covered by the data: photon virtuality $Q^{2}>1$ (GeV/$c$)$^2$, invariant mass of the hadronic system $W > 5$ GeV/$c^2$, Bjorken scaling variable in the range $0.003 < x < 0.4$, fraction of the virtual photon energy carried by the hadron in the range $0.2 < z < 0.8$, square of the hadron transverse momentum with respect to the virtual photon direction in the range 0.02 (GeV/$c)^2 < P_{\rm{hT}}^{2} < 3$ (GeV/$c$)$^2$. [...]
arXiv:1709.07374; CERN-EP-2017-253.-
Geneva : CERN, 2018-02-08 - 23 p.
- Published in : Phys. Rev. D 97 (2018) 032006
Article from SCOAP3: PDF; Draft (restricted): PDF; Fulltext: arXiv:1709.07374 - PDF; CERN-EP-2017-253 - PDF;
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