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RD51 Activities At SINP

RD51 Group Applied Nuclear Physics Division Saha Institute of Nuclear Physics Kolkata, India. RD51 Activities At SINP. RD51 Mini Week CERN, 22-24 April, 2013. Ongoing RD51 Activities. Characterization Studies of Bulk Micromegas

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RD51 Activities At SINP

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  1. RD51 Group Applied Nuclear Physics Division Saha Institute of Nuclear Physics Kolkata, India RD51 Activities At SINP RD51 Mini Week CERN, 22-24 April, 2013

  2. Ongoing RD51 Activities • Characterization Studies of Bulk Micromegas • Measurement of detector characteristics (gain, energy resolution, electron transparency) and their dependence on detector design parameters and gas mixtures • Simulation of detector characteristics to study the effect of different geometry modeling and components • Study of Ion Back Flow in Bulk Micromegas • Measurement of IBF • Characterization Studies of Single GEM (to be extended to Triple-GEM) • Simulation of field distribution and drift in single-GEM with staggered array of holes • Numerical studies on the effect of etching in single-GEM • neBEM Upgrades • Development of solid modeling in neBEM RD51 Mini Week, CERN

  3. Characterization Studies of Bulk Micromegas (Preliminary) Measurements at SINP Measurements at IRFU-Saclay Mini Week, Jan2013 VCI2013 Preliminarymeasurements for a new set of bulk Micromegas with different amplification gaps in P10 (no preconditioning done). Maximum gain achieved is higher for smaller gap. RD51 Mini Week, CERN

  4. Characterization Studies of Bulk Micromegas (Preliminary) Measurements at SINP Measurements at IRFU-Saclay Mini Week, Jan2013 VCI2013 Preliminary results show better resolution for larger gap at higher field with P10. 192 micron shows much worse resolution w.r.t earlier observation with Ar-Iso (90:10). RD51 Mini Week, CERN

  5. Characterization Studies of Bulk Micromegas (Preliminary) Measurements at SINP Measurements at IRFU-Saclay Mini Week, Jan2013 VCI2013 Larger gap shows much better transparency at higher drift field. RD51 Mini Week, CERN

  6. Study of Ion Back Flow (IBF) in Bulk Micromegas (Preliminary) Setup of IBF measurement at IRFU-Saclay RD51 Mini Week, CERN

  7. Study of Ion Back Flow (IBF) in Bulk Micromegas (Preliminary) IBF in double drift mesh is much lower w.r.t single one. RD51 Mini Week, CERN

  8. Study of Ion Back Flow (IBF) in Bulk Micromegas (Preliminary) IBF shows lower value for smaller gap except 64 micron case which exhibits the largest IBF. RD51 Mini Week, CERN

  9. Characterization Study of GEM (to be extended to Triple-GEM) (Expt. Ref. Ph.D Thesis of G. Croci) Regular array of holes Collaboration Meeting, SBU Oct2012 RD51 Mini Week, CERN

  10. Characterization Study of GEM (to be extended to Triple-GEM) (Preliminary) GEM Device Staggered array of holes Axial Field Distribution with Hole Array LU-1x5, t=0s LU-5x11, t=3395s SVD-5x11, t=41000s SVD-1x5, t=14s RD51 Mini Week, CERN

  11. Characterization Study of GEM (to be extended to Triple-GEM) (Preliminary) SVD versus LU in Periodic Array LU-1x5 SVD-1x5 Transverse potential 10 micron above the upper surface RD51 Mini Week, CERN

  12. Characterization Study of GEM (to be extended to Triple-GEM) (Preliminary) Study on flourine etching in single-GEM Etched GEM (Model A) Etched GEM (Model B) Perfect GEM Axial Field Off-Axial Field RD51 Mini Week, CERN

  13. Characterization Study of GEM (to be extended to Triple-GEM) (Preliminary) RKF Monte-Carlo Perfect GEM Etched GEM (A) Gain distribution using MC method RD51 Mini Week, CERN

  14. Upgrade of neBEM Development of solid modeler using BRL-CAD is underway. X3D representation of a GEM EUCLID representation of a GEM EUCLID format in BRL-CAD will be opted for solid representation. RD51 Mini Week, CERN

  15. Future Plans • Continuation of detailed characterization of Bulk Micromegas with different amplification gap using experimental and numerical investigations. • Setup of well planned IBF test at Kolkata and its measurement in Micromegas. • Initiation of experimental characterization of GEM and its extension to Triple-GEM. • Continuation of numerical simulation of GEM and Triple-GEM in future to compare with experiments. • Continuation of numerical simulation to study the effects of defects, artifacts and other components (spacer, frame) in Micromegas and GEM. • Initiation of simulation on space charge and charging up effects. • Development of solid modeler and interface of neBEM with GARFIELD++. Acknowledgement: David Attie, Paul Colas, Wenxin Wang RD51 Collaborators Scientific Assistants at SINP Students at SINP Group Members: Purba Bhattacharya Sudeb Bhattacharya NayanaMajumdar SupratikMukhopadhyay RD51 Mini Week, CERN

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