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{{ :GEMs_Test_Chamber_080808.jpg?400 }}

====== Chamber Design ======
  * [[Historical Design Notes]]
  * [[Pad plane design]]
  * [[Flex cables]]


====== Gas Handling ======
Primary Contact: Gary Westfall \\ 
Secondary Contact: Hui Wang \\ 
\\ 
Describe current gas system \\ 
Provide operational instructions \\
Detail problems with system \\ 
Gary & Hui's plans \\ 






====== Flammable Gas Safety Review ======
Primary Contact: Daisuke Suzuki \\ 
Secondary Contact: Krista Cruse \\ 

**<< The 1st meeting >>**  \\
2009/4/30 @ Seminar room \\
Participants: David Erickson, Peter Grivin, WM, AB, KC, DS

**<< The 2nd meeting >>** \\
2009/5/15 10h - 11h  @ Theory library \\
Participants: DE, PG, Ashley Garrett, John Yurkon, WM, HW, DS

  * We agreed on the new gas flow scheme.
  * We are going to change the gas flow system based on the new scheme. After completing the new system, we will go through a gas safety review.
  * To do: Making the work order. 

Slides:\\
{{:newgasflowcircuit_definitive_09-05-15_.pdf|:newgasflowcircuit_definitive_09-05-15_.pdf}}

Hydrogen gas safety guide by Los Alamos:\\
{{:hydrogengassafety.pdf|:hydrogengassafety.pdf}}




































====== Gas Handler Modification ======
\\ 
{{:purchase_list.xls|Purchase Order List}} //Last Update August 6, 2009//

{{:material_list.xls| Material List}} //Last Update June 29, 2009//


{{:flow_scheme.ppt|Gas Flow Scheme}}  //Last Update June 18, 2009//


**Design of the new gas handler** //Last Update August 4, 2009//

{{:gsh_front.pdf|Front Panel}}
{{:gsh_section_a.pdf|Cross Section A}} 
{{:gsh_section_b.pdf|Cross Section B}}
{{:gsh_section_c0.pdf|Cross Section C0}}
{{:gsh_section_c1.pdf|Cross Section C1}}
{{:gsh_section_c2.pdf|Cross Section C2}}
{{:gsh_fixer.pdf|Fixer}}
{{:gsh_top.pdf|Top Plate}}
{{:gsh_bottom.pdf|Bottom Plate}}
{{:gsh_side.pdf|Side Plate}}
{{:gsh_support_01.pdf|Support 01}}
{{:gsh_support_02.pdf|Support 02}}\\

(Minimum version)\\
{{:gsh_front_r.pdf|Front Panel}}
{{:gsh_top_r.pdf|Top Plate}} 
{{:gsh_bottom_r.pdf|Bottom Plate}}
{{:gsh_side_r.pdf|Side Plate}} \\

** Work order (submitted to NSCL 7/08/2009) **\\
// ID: // 2888-001-MD-001\\
7/08-7/15/2009: With contact person \\
7/15/2009: Rejected; will be handled by detector lab per Mantica/Morrissey.\\
7/16/2009: Resubmitted\\
// ID: // 2888-000-FC-002\\
7/21/2009: Cancelled.\\

** Work order (submitted to the physics department) **\\
//Contact: //\\
Thomas Palazzolo, Instrument Shop Manager\\
palazzolo@pa.msu.edu\\
(517)884-5540 \\

{{:physicsshoporder_2009-08-04_.xls|Physics shop workorder form}}\\
{{:product2physicsmachineshop.xls|Internal components to the physics machine shop}}

8/6/2009 9-10h @#1213, BPS buiding; Meeting \\
8/20/2009 @NSCL machine shop;
KF25 flanges was welded on both the ends of the flexible tube that connects the pump exhaust to the vent.\\
8/21/2009 @BPS; The box (w/o the front panel), piping pieces and fixers have already been made.\\
8/21/2009 @N1; The flexible tube for vent was installed.\\
9/30/2009 @N1; Completed.\\

====== Leak Testing ======
February 2009: \\ 
  * Pressure: steady at <10mTorr
  * Leak Rate: 2x10^-8 mL/s, 0.2 Torr/hr
  * small leaks around o-rings of door => o-ring replaced
April 2009: \\ 
  * new leak tests performed by Daisuke & Wolfi
  * update current status here










====== High Voltage ======
Primary Contact: Krista Cruse \\ 
Secondary Contact: ???? \\ 

**High Voltage Supplies** \\ 
Two high voltage supplies are currently in use with the test chamber.  A 20kV Bertan supply, model 205B-20R and a 2 channel 5kV programmable CAEN supply, model N570.  These supplies are currently being used to power the cathode and the active components (GEMs and Micromegas) of the chamber. \\


**Manuals** \\
{{:bertan_high_voltage_supply_manual_model_205b.pdf|:bertan_high_voltage_supply_manual_model_205b.pdf}}\\
{{:caen_high_voltage_supply_model_n570.pdf|:caen_high_voltage_supply_model_n570.pdf}}\\


**Operational instructions** \\
__Bertan Supply__\\
  * Can be operated as positive or negative polarity.
  * 20kV maximum with 1mA current and 300mV ripple.
  * LED monitor has switch for voltage and current output readings.
__CAEN Supply__\\
  * 2 channels with polarity selection.
  * Voltage-Current ranges: 0 to +/-10kV at 1mA and +/-10kV to +/-15kV at 0.5mA
  * Programmable via front panel keyboard or CAENET network software (remotely).
  * Numerous programmable parameters including  voltage and current limits, ramp speeds, current trip levels and times.  Refer to page 12 of manual for full programmable settings.



**Voltage divider circuits**\\
  * Independent GEMs: {{:voltagedivider_independent_gems_5_05_09.ppt|:voltagedivider_independent_gems_5_05_09.ppt}}\\
  * Microgmega: {{:voltage_divider_with_micromegas_5_05_09.ppt|:voltage_divider_with_micromegas_5_05_09.ppt}}\\
      * Voltage divider spreadsheet for linked Gems, independent Gems and Micromegas (12/19/08): {{:TestChamberGEMCircuit_All_081219.xls|TestChamberGEMCircuit_All_081219.xls}}

  * Cathode and Equipotential Planes (to create uniform drift field)
     * Component Voltage Ratings {{:cathode_circuit_component_voltage_ratings.xls}}
     * Nominal Operating Conditions
     * Work Summary - 7/28/2009  {{:work_summary_for_cathode_circuit_7_28_09.doc}}








====== Gas Electron Multipliers ======
  * [[Small GEM Studies]]
  * [[GEM Aging]]
  * [[GEM Mounting Procedure]]
  * [[Gain Studies]]
  * [[Resolution Studies]]












====== Electronics & DAQ ======
Primary Contact: Daisuke Suzuki \\ 
Secondary Contact: Hui Wang \\ 
\\ 
**Document**\\
//Canberra Model 2006 (Preamplifier) manual//{{:2006_ss.pdf|:2006_ss.pdf}}\\
//Canberra Series 35+ (MCA) manual//{{:series35_.pdf|:series35_.pdf}}\\
//Data acquisition with FemStuc //
{{:data_acquisition_with_the_femstuc.doc|:data_acquisition_with_the_femstuc.doc}}\\
//Data Analysis //
{{:data_analysis.pdf |:data_analysis.pdf }}\\
// T2K Electronics//
[[http://groups.nscl.msu.edu/tpc/wiki/doku.php?id=t2k]]\\
- {{:configurationscalibration.ppt|DAQ configurations for calibrations using the on-board pulser (8.21.2009 DS)}}

Documentation for running the electronics in calibration mode\\
{{:t2k_calibration_mode.doc|:t2k_calibration_mode.doc}}

====== Computing ======
Primary Contact: Abby Bickley \\ 
After acquiring data from the test chamber it should be transferred off of the daq laptop for analysis.  A group account has been established on the NSCL farm for this purpose.  \\ 
 - account name: tpcdev \\ 
 - account pwd: email Abby if you don't know \\ 
To transfer the data follow these [[instructions]]. \\ 
\\ 
The data can be accessed from any computer using the group account or your personal NSCL account.  If you choose to write files using your personal account please make sure your permissions are set to allow group read and write access to facilitate group disk management.  To facilitate group file management I suggest that you create a directory named as your nscl username to store all of your code and processed files.  Creation of this directory will be a good test of whether you have write access to the group directories.  
\\
\\ 
Two directories have been created for our use.  Each has its distinct purpose.  Please follow these standards.\\ 
 - /projects/proj2/e09043/: this space is backed up by the lab and is designated for saving code; do not store data or large root files here. \\ 
 - /evtdata/e09043/: this space is not backed up by the lab and is designated for saving data; do not store code in this directory; a recent catastrophic failure resulted in the loss of these disks. \\ 
 
\\ 
====== Tracking =====
NIFFTE Virtual Machine file and README:
http://nuclear.calpoly.edu/~niffte/NiffteVM/
\\
Sparsely populated NIFFTE homepage:
http://nuclear.calpoly.edu/~niffte/
\\
NIFFTE manual V1\\
{{:NIFFTE_Software_Manual.pdf|:NIFFTE_Software_Manual}}

\\

====== Triggering =====
Primary Contact: Hui Wang \\
Secondary Contact: Krista Cruse \\ 
\\ 
update with detailed info of cosmic trigger setup and operation


====== Laser System ======
Primary Contact: Wolfgang Mittig \\ 
Secondary Contact: Terry Tarnowsky \\ 
\\ 
update with design & construction plans






====== Work Plan ======

\\ 
\\ 




====== Meeting Archive ======
  * [[Test Chamber Update Meeting 12/16/2008]]
  * [[Organizational Meeting 4/22/2009]]
  * [[Flammable Gas Safety Meeting 4/30/2009]]
  * **Weekly Meeting 5/21/2009** Minutes:
      * {{:at-tpc_meeting_minutes_5_21_09.doc|:at-tpc_meeting_minutes_5_21_09.doc}}
      * {{:meeting_minutes_7_16_2009.doc|:meeting_minutes_7_16_2009.doc}}