GEM tests at BNL Zvi, Sasha, Ilia and others. Triple GEM detector tests Last Tuesday after HBD meeting we exchanged CF4 by Ar/CO2 but still there were.

Slides:

Advertisements

Similar presentations

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

Advertisements

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 Short update Itzhak Tserruya HBD meeting BNL, April 11, 2006.

HBD HV Control and Monitoring System A Gain vs. HV study throughout Run-9 – PART 2 – Manuel Proissl HBD Meeting 06/23/2009.

1 Stony Brook Update Getting Serious about HBD East T.K. Hemmick for the Tent Crew.

TRD Collaboration meeting GSIClemens Adler First TRD Production Chambers Production Tests Results Documentation.

TRD Collaboration meeting GSIClemens Adler First Production Chambers Production/tests/results.

Threads CS 416: Operating Systems Design, Spring 2001 Department of Computer Science Rutgers University

Tent Update 5 Feb 2008 Matt Durham for tent crew.

Welcome. Who am I? Philip L. Sullivan MCT, MCSE, MCSA Microsoft Certified Trainer for 6 Years Work as a Lead Windows NT\2000\2003 Instructor for Clark.

CsI Photocathode Production and Testing

1 Stony Brook Update: T.K. Hemmick for the Tent Crew.

01/07/08I. Ravinovich1 HBD Update Ilia Ravinovich DC Meeting, January 9, 2008.

HBD Tasks Outline Thomas K Hemmick. New News  Second good QE result from Bob.  New quotes on reduced Glove Box:  $39,000 will not work (air lock too.

HBD Operation in Run 9 Thomas K Hemmick for the HBD Crew.

1 Sasha Milov DC meeting Dec 7, 2005 HBD upgrade status. Sasha Milov Dec 07, 2005.

1 Searching for the QGT: Quantum Efficiency Gain Transparency TK Hemmick for the HBD Crew.

1 AGENDA: HBD NIM paper#2 Itzhak HBD HV system HBD monitoring Acceptance and total number of channels Proposal status Large GEM tests Lev Monte Carlo Ilia.

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.

1 Stony Brook Update Stretching your LEGS T.K. Hemmick for the tent crew.

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

Cube Measurements Tent Crew. Scintillation BNL 241 Am Semi- collimated  Spectralon Diffuse UV Reflector SBD  -Trigger Scint. Light Poisson.

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

An exercise in using The Scientific Process Tuesday, April 20, 2010 (Projects due FRIDAY, April 16 th )

Rhino project.. Rhino Rhino is a program where u can take a 2D object a make it 3D. Rhino allows you to rotate, break down, and design an object from.

1 HBD Update Setback via Gas Accident T.K. Hemmick for the HBD Crew.

9A Unit 1 The night of the horse (II). Now listen to the story on page 3 and check your answers.

1 Stony Brook Update: Keep It Clean T.K. Hemmick for the Tent Crew.

Update on the HBD Craig Woody BNL DC Meeting June 8, 2005.

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.

Status of GEM T2 assembly Outline Status of the GEM components Summary Tests TOTEM Collaboration meeting CERN / Risto Orava for Kari Kurvinen.

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.

1 HBD update Itzhak Tserruya DC Upgrades meeting, January 14, 2005 NIM paper II: Generic R&D ~ completed Full scale prototype construction Pending issues.

High Gain Mystery of WS(1-5) Solved (Hopefully…) C.Woody HBD Meeting April 13, 2010.

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

1 Sasha Milov DC meeting... March 7, 2007 HBD status Sasha Milov March 7, 2007.

1 TPC R&D proposal from the WIS group I. Ravinovich WIS I. Ravinovich12/15/2015.

HBD Status Craig Woody BNL DC Meeting October 3, 2007.

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

1 Stony Brook Update Jason Kamin… the Cleaning Machine! T.K. Hemmick.

1 Installation Logistics Itzhak Tserruya HBD meeting BNL, July 6, 2006.

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

1 Sasha Milov DC meeting Sept 12, 2007 HBD status Sasha Milov Sept 12, 2007.

1 HBD Update Back to the Future T.K. Hemmick for the HBD crew.

1 Stony Brook Update: Another Frustrating week... However difference is isolated: CF 4 T.K. Hemmick for the Tent Crew.

1 Sasha Milov HBD meeting Oct 24, 2006 LAMP SUNYSB Craig, Matt & Sasha Oct 24, 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.

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

1 HBD Commissioning Itzhak Tserruya DC meeting, BNL December 13, 2006 Progress from October 3 to November 28, 2006.

Gold GEM Recovery Efforts/HBD Updates HBD Meeting 24 June 08.

1 HBD Update Bill and Ted’s Excellent Adventure T.K. Hemmick for the Wyld Stallions.

Gain Curves Jason for the SB Crew June 5, Raw 55 Fe Spectra Start with 55 Fe spectrum from a MCA. Fit peak to gaussian. Calibration from a pulser.

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

1 HBD Update Itzhak Tserruya DC meeting, May 7, 2008 May7, 2008.

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

Recent Gain Changes C.Woody HBD Meeting March 23, 2010.

Using existing lifts in existing buildings to evacuate disabled persons Derek Smith Technical Director UK Lift and Escalator Industry Association.

R&D on Hadron Blind detector, recent results Issues addressed: - gain limits in CF 4 with heavily ionizing particles - operation.

2. SEEKING STEPS QUESTION 3 – Is Jesus satisfying? We will give someone a can of drink.  How long will they not be thirsty for?  How long until they.

1 Stony Brook Update: Power Surprise… T.K. Hemmick for the Tent Crew.

TRIPLEGEM and VFATs at The Test Beam Area TRIPLEGEM and VFATs at The Test Beam Area N. Turini……reporter Eraldo Oliveri! Eraldo Oliveri main worker! N.

HBD HV Control and Monitoring System STATUS UPDATE Manuel Proissl HBD Meeting 01/19/2009.

1 Stony Brook Update Cross Roads T.K. Hemmick for himself.

CS 6560: Operating Systems Design

If you tell him the truth, you will prove how honest you are.

Friday 30th September 06:00 Operator dump fill #2171, int. lumi about 75 pb-1 Previous operator dump from physics was on 14 September ! 07:00 Start of.

Not the most productive 24 hours on record

Monday 8th December Morning used for RF work (IP z, injection), damper noise checks. Stable beams period with LHCb spectrometer OFF – lost beam after.

Presentation transcript:

GEM tests at BNL Zvi, Sasha, Ilia and others

Triple GEM detector tests Last Tuesday after HBD meeting we exchanged CF4 by Ar/CO2 but still there were no signals. Then we started to check every swagelok and found the leaks. After fixing the problem we have seen the signals in Ar/CO2 but in order to get the gain of ~5000 in Ar/CO2 we had to go to dV=430V!!! The GEMs inside the vessel were socalled “Thanksgiving” GEMs. Nevertheless we decided to switch to CF4, raised voltage to 550V and again no signals. Then I decided to go back to Ar/CO2 to check whether there are still the signals at least at that gas. Yes, the signals were there. I left it overnight and in the morning recognized that the gain increased by ~50%. We again started CF4 flow and increased the voltage till 570V and only then we started to see some very low signals of the order of 5-6 mV. At this point we thought that probably there is something wrong with these GEMs and decided to exchange by “Hanuka” GEMs. Raise the voltage, the same. Then we checked CAEN N126 PS and it turned out that it was delivering 20% less voltage than you asked!!! We scaled the voltage by 20% and the signals! The gain was ~5000 at dV=508V. So I left it over night and ask Zvi to bring some more GEMs. In the morning Zvi brought 4 GEMs: as Zvi told these GEMs were tested on the laminar table and showed some current. So they never seen the glovebox. We installed triple GEMs detector (the 4 th one has a scratch, looks like knife). We checked all 3 GEMs in CF4, 2 were fine, the 3 rd one showed the current of the order of ~100 nA at 500V but going down. We waited till went to 0 and then ramped it to 550V. Then RC, some problems with the mesh and finally one of the GEMs showed a short, that was already Friday night.

Summary Although we lost many days fighting with these stupid problems like connectors, leaks, CAEN PS etc we successfully operated two triple GEM stacks: 1.“Thanksgiving” GEMs: these GEMs I sent from WIS to BNL and they never been at SB. 2.“Hanuka” GEMs: these GEMs were tested in quadruple GEM stack at SB and now in triple GEM detector at BNL.