GEM Chamber Construction & Commissioning Twiki

Coordinators: Luigi Benussi (Frascati), Brian Dorney (CERN)

Contact persons at planned production sites:

• Bari - Rosa Maria Venditti
• CERN - J. A. Merlin
• Florida Tech - M. Hohlmann
• Frascati - L. Benussi
• Ghent - M. Tytgat
• Aachen - K. Hoepfner
• India, BARC - L. Pant
• India, Delhi - Md Naimuddin
• India, Punjub - Vipin
• Pakistan - Waqar

Working Group Meetings: Wednesdays at 15:00 (CET)

Organization Chart

Detailed organization:

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Hardware Tracking Page

GE1/1 detectors produced at/by a given site will be given a unique serial number. The format for this serial number should be as follows:

 GE1/1-<Generation>-<Institute>-<Number>  

The number field above should be unique for each generation-institute pairing. For example the first generation four detector built by the CERN group would be listed as GE1/1-IV-CERN-0001 while the first generation five detector built by the CERN group would be listed as GE1/1-V-CERN-0001. Notice in each of these cases the "0001" value is used for the number field. For the special case of generation six a dash followed by either a capital "L" or "S" to indicate if the chamber is either long or short, i.e. GE1/1-VI-L-CERN-0001 for the first long detector built by CERN and GE1/1-VI-S-CERN-0001 for the first short detector built by CERN.

We ask that all of the site local production managers maintain the GE1/1 inventory tables shown on the GEMHistoryPage for their specific site. To edit the tables in the previous link please subscribe to the protected e-group cms-gem-hw-tracking at egroups.cern.ch. After subscribing please send a short email to Brian Dorney explaining your need for use of the e-group (i.e. for GEM hardware tracking), requests without this clarification email may be ignored.

It is highly suggested once a serial number is assigned to a chamber in the GEMHistoryPage to place a label on the detector which indicates the serial number so that you can easily identify a chamber and its history.

Institute Assignments

When assigning serial numbers for the institute field mentioned above please use the string in bold below next your institute name:

• Bari: Bari
• CERN: CERN
• Florida Tech: FIT
• Frascati:LNF
• Ghent: Ghent
• BARC: BARC
• Delhi: DELHI

Quality Control

• QC1
• QC2
• QC3
• QC4
• QC5 - Gain Uniformity
• QC6
• QC7
• QC8 - Cosmic Stand
• QC9
• QC10

Documentation

• Spreadsheet for keeping track of project workflow and milestones (v1.3 - July 5, 2013)
• Assembly & Quality Control Guide for CMS GE1/1 Prototype (June 2013 version for GE1/1-IV, by C. Armaingaud)
• Florida Tech's DATE-AMORE Installation Guide for the SRS (by M.Staib)

Photos & Videos

Assembly of a CMS GE1/1 detector without gluing (June 2013):

* Full movie https://www.dropbox.com/s/ru5ptplzmsu1lv2/Optimus%202.0%20small.mp4

These videos demonstrate the assembly of a CMS GE1/1 Triple-GEM detector (prototype version IV) without the use of any glue. The detector was assembled by Rui de Oliveira in a cleanroom at CERN with some assistance from members of the CMS GEM collaboration. The process took about 3 hours. Shown are the assembly of a Triple-GEM stack with repeated HV testing of GEM foils, the insertion of the GEM stack into the drift board / gas frame assembly, the GEM stretching procedure, the closing of the detector with the readout board, and finally a visual inspection of the flatness of the completed detector.

• A short version (1 min) is provided to give a quick overview.
• A longer version shows the procedure in greater detail.

Infrastructures

Bd. 904 Assembling Clean Room

Project Definition

In view of the CMS experiment upgrade, the GEM technology has been selected as trigger and tracking system in the forward region of the Muon Spectrometer. The assembly of such a detector must to be carried out in a Clean Room of class 1000. The clean room facility shall comprise the clean room proper and two clean room buffers zone for the entrance and exit of the material, t he buffers zone are independent by the SAS area used by the users of the proper clean room. The complete facility shall be equipped with vertical laminar walls and roof producing a vertical airflow extracted by the lateral wall. The clean room will be equipped with a temperature and humidity control and a monitoring system. Clean rooms are classified according to the number and size of particles permitted per volume of air. This clean room facility will be classified as ISO 6 (Class 1000), with an internal area of about 28 m2 limited by moveable curtain, with improved quality but not defined as ISO 5 (Class 100).

Technical Specifications

• Clean room proper: ISO 6 (CLASS 1000) according to ISO 14644-1 over- pressurized with simultaneously 6-7 people working inside; 

• Buffers for the material in/out from the room before entering the proper clean room; 

• Buffer (SAS) for the entrance of the users;
• Clean room is equipped with sub-area, delimited by curtain;
• The buffer area on over pressure with respect to the main building. The clean room over pressure is ΔP=20Pa;
• A Local Exhaust Ventilation system (LEV) to extract fumes eventually produced by soldering activities;
• Interlock system to the entrance doors to avoid possible clean room contamination;
• Temperature and the humidity controlled: * Humidity 40% +/- 10% * Temperature 23 oC +/- 2oC

Layout and Mechanical Assembling

• Main Clean Room structure (Volume ~ 300 m3);
• 1 air lock for user passage (Volume 13.5 m3);
• 2 air lock for material transit (in/out) (Volume 13.5 m3, twice);
• 4 doors, (900 x 2100 mm), completed with interlock system to avoid simultaneous aperture, one of this doors will be used as “Panic Exit”, as reported in Fig. 1;
• 4 doors, (900+900 x 2100) to be installed in the transit material air lock, completed with interlock system to avoid simultaneous aperture;
• Ceiling classified for IS0 6 clean room with the necessary structure for the filter installation as well as for the light installation ;
• Floor supplied and installed using anti-static epoxy resin for use inside clean room for electronics, for a thickness of about 2-3 mm. This floor will be installed with mesh copper conductive placed under the the final coat surface;
• Installation of about 7.5 mt of movable curtain.

Services

The Clean Room will be equipped with:

• Gas lines: four different patch panels for the distribution of gas mixtures. Each patch panel equipped with four different gas lines for the incoming gas and an exhaust line;
• Air compressed line in the air lock space for the incoming material;
• Swiss type plugs 230V for power distribution;
• The clean room will be equipped with white/yellow lights selectable by means of switch.

Safety

To verify the feasibility of the installation the CERN Safety Team has been involved, the reference person for the project is: Fabio Corsanego.

Fabio stated that, the installation of the Clean Room doesn't reduce the space for the emergency exit, the minimal distance between the new structure and the actual room is 1.5 mt above the minimal request of 1.4mt.

Documentation for Price Enquiry

• Technical Specs for GEM Clean Room in 904, to be finalized

Opent Item

• Technical Specs: to be finalized with the support of the CERN Safety group;
• 904 space preparation: The DAQ room will be dismounted by ....... (who and when?)
• Services preparation: GAS group and IT to be contacted at the time of the Price Enquiry launch.
• Price Enquiry: under discussion with the CERN purchasing office

Contact Person

• Design and Technical aspects: Antonio Conde Garcia, Pascal Petiot
• Purchasing and Specific Definitions: Archana Sharma, Michele Bianco
• CERN purchasing office: Sandrine Magnan
• Safety: Fabio Corsanego, Andre Henriques
• CERN GS team: Christophe Martel
• IT: XXXXXX
• GAS system: Mats Wilhelmsson
• Supplier: EcoFreed (Spain)

QC1 Test

In this Quality Control step we perform continuity and shortage tests on the Read-Out Board. The test system is plugged onto each Panasonic connector and the two tests are performed by running a code. To test shortage, a signal is passed onto one of the pins of the connector while the rest of the pins are simultaneously tested for a response. If a signal is detected in any of the neighbouring pins, it indicates a short. This is repeated for every pin on the connector. If there is a short, the connector is said to have failed the test, otherwise it is said to have passed.

Test Details: To run the test, first connect the Arduino board to the laptop. Open Processing software and load the test code from the sketchbook and hit Run. This will launch the UI of the system. Enter your details and start the test. Plug the read-out connector of the system onto the Panasonic connector, of the board, that is to be tested and select the corresponding connector on the screen. Now, click on the type of test to be performed. The result of the test (Pass or Fail) would be indicated on the screen. Repeat for every Panasonic connector on the panel. Code: ConfigArduino.zip</verbatim> QC1 Results: StripTest_Results.zip: StripTest _Results.zip</verbatim>

The electrical schema of the PCBs board used for the QC1 test is here available: QC1 PCB electrical test: * StripTesting.zip</verbatim>

GEM Foil Production

GEM foil production is done in the MPT workshop at CERN (Bd 102) . The Foils are then delivered to the Lab located in building 186 (From FEb. 2017 to Bd 904) where they are tested by the GEM group members. Both the Long and Short Foils undergo QC2-fast and QC2-Long tests successively, and if fail to match the expected behavior they are sent back to the MPT workshop.
Summary Foils delivery / test / batch production / payment status: Test_Summary </verbatim>
Foils delivery and test rate: * Production_and_testing</verbatim>

QC2_Fast Test Data

QC2 Fast Long Foils up to Batch 11 * Long_Foil_TestsOverall</verbatim>

QC2 Fast Short Foils up to Batch 11 * Short_Foil_TestsOverall</verbatim>

QC2 Fast test results

Data * Batch #12</verbatim>

Data * Batch #13 </verbatim>

Data * Batch #14 </verbatim>

Data * Batch #15 </verbatim>

Data * Batch #16 </verbatim>

Data * Batch #17 </verbatim>

Data * Batch #18 </verbatim>

Data * Batch #19 (Only short foils at the moment, long not yet delivered )</verbatim>

Data * Batch #20 (Only short foils at the moment, long not yet delivered )</verbatim>

Data * Batch #21 </verbatim>

Data * Batch #22 </verbatim>

Data * Batch #23 </verbatim>

Data * Batch #24 </verbatim>

Data * Batch #25 </verbatim>

Data * Batch #26 </verbatim>

QC2_Long Test Data

Foils QC2 Long Run List * QC2_RunList</verbatim>

QC2 Long test results

Data * Batch #4</verbatim>

Data * Batch #5</verbatim>

Data * Batch #6</verbatim>

Data * Batch #7</verbatim>

Data * Batch #8</verbatim>

Data * Batch #9</verbatim>

Data * Batch #10</verbatim>

Data * Batch #11</verbatim>

Data * Batch #12</verbatim>

Data * Batch #13</verbatim>

Data * Batch #14</verbatim>

Data * Batch #15</verbatim>

Data * Batch #16</verbatim>

Data * Batch #17</verbatim>

Data * Batch #18</verbatim>

Data * Batch #19</verbatim>

Data * Batch #20</verbatim>

Data * Batch #21</verbatim>

Data * Batch #22</verbatim>

Data * Batch #23</verbatim>

Data * Batch #24</verbatim>

Data * Batch #25</verbatim>

QC2_Long: Test Code

QC2_Long_Test_Code.zip</verbatim>

QC2 Test: Procedure

QC2_Procedure</verbatim>

GE1/1 PCB QA/QC

• 2016-06-06_09-12-40_LeakageTest-FoilID_57_Long.dat: ROOT Macros and data files.</verbatim>

• 2016-06-06_17-59-16_LeakageTest-FoilID_57_Long.dat: ROOT Macros and data files.</verbatim>

• plotdatafile1.C: ROOT Macros and data files.</verbatim>

• plotdatafile2.C: ROOT Macros and data files.</verbatim>

• StripTestingPowerpoint_v4.pptx: User Guide to the testing device</verbatim>

• ConfigArduino_v2.zip: Processing code v2</verbatim>

• StripCompiled_v2.zip: Arduino testing code v1</verbatim>

• StripTest_Results.zip: StripTest _Results.zip</verbatim>

GE1/1 Assembled Chambers

GE1/1 Chambers Assembled at CERN

Short Chambers

GE1/1-X-S-CERN-0001 * Components list</verbatim>

GE1/1-X-S-CERN-0002 * Components list</verbatim>

GE1/1-X-S-CERN-0003 * Components list</verbatim>

GE1/1-X-S-CERN-0004 * Components list</verbatim>

GE1/1-X-S-CERN-0005 * Components list</verbatim>

GE1/1-X-S-CERN-0006 * Components list</verbatim>

Long Chambers

GE1/1-X-L-CERN-0001 * Components list</verbatim>

GE1/1-X-L-CERN-0002 * Components list</verbatim>

GE1/1-X-L-CERN-0003 * Components list</verbatim>

GE1/1-X-L-CERN-0004 * Components list</verbatim>

GE1/1-X-L-CERN-0005 * Components list</verbatim>

GE1/1-X-L-CERN-0006 * Components list</verbatim>

GE1/1-X-L-CERN-0007 * Components list</verbatim>

GE1/1-X-L-CERN-0008 * Components list</verbatim>

GE1/1-X-L-CERN-0009 * Components list</verbatim>

GE1/1-X-L-CERN-0010 * Components list</verbatim>

GE1/1-X-L-CERN-0011 * Components list</verbatim>

GE1/1-X-L-CERN-0012 * Components list</verbatim>

GE1/1-X-L-CERN-0013 * Components list</verbatim>

GE1/1-X-L-CERN-0014 * Components list</verbatim>

GE1/1-X-L-CERN-0015 * Components list</verbatim>

GE1/1-X-L-CERN-0016 * Components list</verbatim>