CsI Photocathode Production and Testing

Slides:

Advertisements

Similar presentations

GEM Chambers at BNL The detector from CERN, can be configured with up to 4 GEMs The detector for pad readout and drift studies, 2 GEM maximum.

Advertisements

Prototype Progress… The Stony Brook Crew & Bob Azmoun, Craig Woody.

HBD Meeting 4/25/06 SB and BNL Crew. 4/25/06 B. Azmoun 2 Installation of HBD into PHENIX Transported HBD from USB under gas (CF4) flow (maintained ~ 1Torr.

1 HBD Update Itzhak Tserruya DC meeting, April 9, 2008 April 9, 2008.

Preliminary Quintuple GEM CsI Ring Imaging Cherenkov Detector S.A. Zajac*, T.K. Hemmick*, K. Dehmelt*, T.E. Videbaek*, & M.A. Blatnik** *Stony Brook University.

9/15/04B. Azmoun1 Transmittance as a Function of Water and Oxygen Levels in the VUV Regime Bob Azmoun, Brookhaven National Lab.

Prototype of the Daya Bay Neutrino Detector Wang Zhimin IHEP, Daya Bay.

6/8/2006 Particle Physics Division Technical Centers 1 Vacuum Deposition Thin Film Coatings Facility at Lab 7 Eileen Hahn.

HBD Transmission Monitor: Update on Assembly & Testing HBD Working Group Meeting 8/29/06 B. Azmoun Brookhaven National Lab.

1 HBD Update Itzhak Tserruya DC Upgrades meeting HBD, BNL, July 13, 2005 Prototypes  Full scale HBD  Readout board  FEM Final detector  HBD Design.

1 HBD Construction status Itzhak Tserruya DC meeting, BNL, February, 2006 Plans for Run-6 Box construction GEM assembly and testing Status of urgent items.

HBD Meeting 3/14/06 B. Azmoun BNL Testing and Preparation of HBD Full Scale Prototype for Upcoming Engineering Run Puzzling Behavior of GEM’s To Do List.

A RICH Detector for strangeness physics A RICH Detector for strangeness physics in Hall A at Jefferson Lab in Hall A at Jefferson Lab. Why. How. Main Characteristics/Expected.

1 Sasha Milov DC meeting Jan 11, 2006 HBD upgrade status. Sasha Milov Jan 11, 2006.

Preliminary Results from a Trial Beam Test of the Small HBD Prototype at LEGS Bob Azmoun BNL HBD Working Group Meeting May 10, 2005.

PHENIX Experiment, Brookhaven National Laboratory June - July 2004

SoLID Cherenkov detectors: SIDIS & PVDIS Simona Malace (Duke), Zein-Eddine Meziani (Temple) Collaborators: Haiyan Gao, Gary Swift SoLID Collaboration Meeting,

Hadron Blind Detector:

Jason Kamin May 17 th, Title Slide!! HBD. Jason Kamin May 17 th, Di-lepton Physics Diverse Physics: –Vector Mesons –Dalitz –Correlated semi-

1 HBD Plans for run-6 Itzhak Tserruya DC meeting, BNL, October 12, 2005 HBD status Plans for run 6 ( Back-up: details presented in Upgrades meeting yesterday)

Sasha Milov EC/DC meeting March 9, Assembly and testing facility. Sasha Milov March 9, 2005 Sequence of operations Glove Box Evaporator Other needs.

1 Thomas K Hemmick May 17 th, The Gas Electron Multiplier: GEM Thomas K. Hemmick Stony Brook University.

Gas measurements and CsI photocathode studies at WIS Ilia Ravinovich November 2002 Weizmann Institute.

Prototype Tests and Construction of the Hadron Blind Detector for the PHENIX Experiment at RHIC Craig Woody Brookhaven National Lab For the PHENIX Collaboration.

1 Satoshi Mihara for the   e  collaboration, review meeting at PSI, Jul 2002 Photon Detector Satoshi Mihara ICEPP, Univ. of Tokyo 1.Large Prototype.

A RICH detector for CLAS12 CLAS12 European Workshop February 25-28, Genova, Italy Evaristo Cisbani INFN Rome and ISS Patrizia Rossi INFN- Laboratori.

HBD Transmission Monitor Update VIII: HBD Gas Transmittance + Systematic Error HBD Working Group Meeting 1/23/06 B.Azmoun, S.Stoll Brookhaven National.

12/12/09 MPGD 神戸大学 1 Yusuke Komatsu A B. Azmoun B, C. Woody B, K. Ozawa A University of Tokyo A,Brook Haven National Lab. B.

HBD Gas and QE Monitoring Craig Woody BNL HBD Working Group Meeting October 19, 2005.

1 Sasha Milov DC meeting Nov 9, 2005 HBD upgrade status. Sasha Milov Nov 09, 2005.

Itzhak Tserruya, July 7,  Towards HBD Proposal  Ongoing activities and plans for the next two months Itzhak Tserruya HBD meeting at BNL, September.

HBD CDR Gas System and Monitoring Craig Woody BNL DC Upgrades/EC Meeting March 9, 2005.

10/26/06Takao Sakaguchi, BNL1 Hadron Blind Detector for the PHENIX experiment at RHIC Takao Sakaguchi Brookhaven National Laboratory For the PHENIX Collaboration.

Status of TPC/HBD for PHENIX Craig Woody BNL DC Upgrades Meeting February 12, 2002.

6-Aug-02Itzhak Tserruya PHENIX Upgrade mini-Workshop1 Boris Khachaturov, Alexander Kozlov, Ilia Ravinovich and Itzhak Tserruya Weizmann Institute, Israel.

A Hadron Blind Detector for the PHENIX Experiment at RHIC Babak Azmoun for the PHENIX Collaboration Brookhaven National Laboratory October 13, 2004.

Itzhak Tserruya, BNL, May13, HBD R&D Update: Demonstration of Hadron Blindness A. Kozlov, I. Ravinovich, L. Shekhtman and I. Tserruya Weizmann Institute,

Study of TGEMs and RETGEMs for the possible ALICE upgrade By Himank Anand and Isha Shukla (CERN summer students) Supervisor :Vladimir Peskov.

TPC/HBD R&D at BNL Craig Woody BNL Mini Workshop on PHENIX Upgrade Plans August 6, 2002.

HBD Status for Run 10 C.Woody For the HBD Group Collaboration Meeting January 15, 2010.

Pe Collection Efficiency in CF4 Revisited HBD Meeting 04/15/08 B.Azmoun, A.Caccavano BNL.

Future Possibilities for Measuring Low Mass Lepton Pairs in Christine Aidala for the Collaboration Quark Matter 2002, Nantes.

1 HBD: Update and Schedule Itzhak Tserruya DC Meeting, BNL, April 13, 2005 Outline:  Full scale prototype status  Light source test  Construction Schedule.

Update on the HBD Craig Woody BNL DC Meeting May 11, 2005.

Collection of Photoelectrons from a CsI Photocathode in Triple GEM Detectors Craig Woody Brookhaven National Lab B.Azmoun 1, A Caccavano 1, Z.Citron 2,

RICH detector for CLAS12 CLAS12 Technical Workshop P. Rossi Laboratori Nazionali di Frascati - INFN.

1 Alexander Milov CIPANP06 June 02, 2006 Hadron Blind Detector for PHENIX experiment at RHIC Alexander Milov (for the PHENIX collaboration) Jun 02, 2006.

The PHENIX Hadron Blind Detector Craig Woody PHENIX Focus February 9, 2010.

Plans to Test HBD Prototype in Run 6 Craig Woody BNL DC Meeting March 8, 2006.

1 HBD R&D: Update Itzhak Tserruya (for A. Kozlov, I. Ravinovich and L. Shekhtman) Weizmann Institute, Rehovot DC meeting Feb. 14, 2003.

PHENIX Safety Review Overview of the PHENIX Hadron Blind Detector Craig Woody BNL September 15, 2005.

1 HBD Update Itzhak Tserruya Upgrades meeting, BNL, October 11, 2005 Full-scale Prototype status Safety Review Detector box construction GEM production.

HBD Report Craig Woody BNL DC Meeting January 7, 2009.

Collection of Photoelectrons from a CsI Photocathode in Triple GEM Detectors C. Woody B.Azmuon 1, A Caccavano 1, Z.Citron 2, M.Durham 2, T.Hemmick 2, J.Kamin.

1 HBD: Responsibilities, Cost and Schedule Itzhak Tserruya EC/DC Meeting, BNL, March 9, 2005.

1 Sasha Milov Phenix focus HBD June 20, 2006 Hadron Blind Detector for low mass di-leptons in PHENIX Sasha Milov (PHENIX focus on HBD) Jun 20, 2006.

Il Ring Imaging CHerenkov (RICH) detector a Jefferson Lab – Hall A.

Preparations to Install the HBD for Run 6 Craig Woody BNL PHENIX Weekly Meeting January 26, 2006.

Initial Performance of the PHENIX Hadron Blind Detector at RHIC Craig Woody Brookhaven National Lab For the PHENIX Collaboration N IEEE Nuclear.

P HOTON Y IELD DUE TO S CINTILLATION IN CF4 Bob Azmoun, Craig Woody ( BNL ) Nikolai Smirnov ( Yale University )

Measurements of the Absolute Absorbance/Transmittance of Ar using a Gas Flow System Bob Azmoun; SUNY Stonybrook, BNL 1/22/03.

Update on HBD Activities at BNL Craig Woody BNL HBD Working Group Meeting November 16, 2004.

1 Update from the Tent Thomas K Hemmick for the Tent People.

Study of the cryogenic THGEM-GPM for the readout of scintillation light from liquid argon Xie Wenqing( 谢文庆 ), Fu Yidong( 付逸冬 ), Li Yulan( 李玉兰 ) Department.

Pulsed Laser Deposition and Quantum Efficency of Mg films University of Lecce L. Cultrera.

© 1997, Angus Rockett Section I Evaporation.

THGEM: Introduction to discussion on UV-detector parameters for RICH

Production of Cesium Iodide Photocathodes for

-Honors Thesis Defense- In Situ Ellipsometry of Surfaces in an Ultrahigh Vacuum Thin Film Deposition Chamber Joseph Choi Department of Physics and Astronomy,

BNL Photocathode R&D An overview of research on high quantum efficiency photocathodes and associated laser systems Andrew Burrill HPHB Workshop Nov 9,

Presentation transcript:

CsI Photocathode Production and Testing Bob Azmoun Brookhaven National Lab 12/8/04 12/8/04 B. Azmoun

CsI Deposition @ Stony Brook Objective: To develop and test the technique of CsI evaporation at Stony Brook for production of CsI coated GEM foils for HBD prototypes and possibly even the final detector. Method Use high purity CsI (Scintillator grade) High Vacuum (1E-7 Torr) [diffusion pump w/ N2 trap] Thoroughly clean vessel and all components Bake the CsI Mask substrates Evaporate very small amount of CsI This vaporizes any contaminants on molybdenum boat and/or outer surface of CsI crystals Vessel walls coated with CsI will also act as a “getter” Warm up substrates before, during and after evaporation Withholds water and contaminants from condensing onto the substrates before deposition, and onto the CsI after deposition Thickness monitor Quartz crystal oscillator, Al foil control substrate Transportation/ Storage of Photocathodes (vacuum, gas flow) 12/8/04 B. Azmoun

Dimensions of Evaporator Vessel Max. Height ~80cm Scaffolding: Photocathode substrate/Thickness monitors Bell Jar Diameter ~ 43cm mask Electrodes/CsI crystal/ Molybdenum Boat 12/8/04 B. Azmoun

Thickness Uniformity r Underside of Scaffolding CsI Thickness Target: 2000 Angstroms Al Foil Control Substrates for measuring CsI thickness r Quartz Crystal Thickness Monitor Quartz crystal thickness monitor Au-Ni-Cu clad G-10 Photocathode Substrates 12/8/04 B. Azmoun

Testing Apparatus @ BNL Absolute QE of produced Photocathodes Vs Wavelength Photoelectron signal in CF4 (CF4 transmittance) GEM systematics (gain, stability, etc.) Systematic Measurements of CsI Coated Triple GEM (pe collection efficiency Vs ED, etc) Beam splitter/Collimator MgF2 Windows VUV beam Photocathode or Triple GEM Absorption Length ~ 30cm Independent Lamp Monitor Photocathode Test Vacuum Vessel (“cross”) 12/8/04 B. Azmoun

Preliminary Measurements 12/8/04 B. Azmoun

Initial Use for CsI Photocathodes Preliminary Tests in Idealistic Stainless steal vessel (Cross) GEM + CsI + CF4 + single pad + gas tight vessel (minimal out-gassing, high purity gas) Systematic measurements of CsI coated triple GEM detector (Gain, stability, QE measurement, transmittance, pe collection efficiency Vs ED, etc) Install (10x10cm) CsI coated GEM into “simple” HBD prototype with “realistic vessel” (made of G-10) GEM + CsI + CF4 + 16 pads (~1x1”) + ~50cm radiator In Lab tests: gas quality (H2O/O2 ppm’s, transmittance), performance of GEMs/CsI in more realistic conditions (gain, stability, aging studies of CsI QE in gas, etc) Test at Light Source: N0 measurement Test inside PHENIX IR: Stability of GEMs, background, etc. ??? 12/8/04 B. Azmoun