The CU is different from the LAT in many respects, so is the software to run it. There is essentially only a single local installation allowing to run the CU, right now, and it resides on the lat-btserver - latbt01 machines. Here are some notes about the installation itself, the tests that can be performed, the schema files to be used.
Flight Hardware : TKR (FM8) & CAL (FM101) on bay 3 (close to the edge) and CAL (FM109) on bay 1.
Patrick will back-up all data from the computers. Reference runs for data taking were not linked because we are not connected to the farm (behind firewall).
No modifications were done or rework on towers during the beam test. During intergration for 1 x 4 one TKR connector for cable 7 of non-flight TKR, slightly shifted and we added a connector saver to avoid stress in the cable.
No anomalies or failures were experience over the coruse of the beam test that would degrade the flight hardware. The fact that CU passed functional tests below demonstrates that.
All data from the beam test can always be accessed through the beam test database. These data is stored at SLAC since all tests were conducted using the SLAC pipeline while at CERN or GSI.
The documentation of all beam test activities is available in this link
Clearance is very small, exercise care before remving the Inner Shiopping Container.
Here is the list of functional tests we performed as part of the incoming procedure.
There is no TKR module 1 so in LATTE do not power on this tower otherwise you will get errors.
For charge injection runs, tests are self-contained and results labeled PASSED are meaningful. Charge injection tests are done one tower at the time.
For data taking tests we added a reference taken from the Beam Test at CERN (see below) because PASS/FAIL condition is affected by how we treated the FIFO errors. Also configuration of the set-up may affect rates. So the figure of meirt for the data taking is that event rates are consistent with expectations.
* Note that TKR FM16 (connected to TEM 2) is not filght and it does have its "features" and idiosyncrasies. In particular there are quite a few layers failing in terms of disconnecetd/defecting channels (Y15, X13, Y11, Y10, Y2). A good reference run for comparison (though quite old, now, and taken with a different software version) is run 700000107:
Both the LATTE and the INT releases are installed onto lat-bt01 in
/usr/local/online |
For the beam we had to make quite a few specific modifications to the code (both the core stuff and the subsystem scripts) to be eventually able to run a limited subset of the test scripts. Rather than modifying the released code directly, those changes live in a separate folder:
/gnfs/home/glast/work/INT/DebugArea |
which is prepended to the $PYTHONPATH (i.e. the system searches for hacked versions of the python files here, first, and then looks into the standard installation directory). The files living in this folder can be modified by the user glast (i.e. you don't need to be root).
Links to the relevant configuration files and test scripts also live nearby, the directory structure being the following:
/gnfs/home/glast/work/INT/repos/Schema/Calibration (CU_TEM_1.xml, CU_TEM_2.xml, CU_TEM_3.xml) |
/gnfs/home/glast/work/INT/repos/Schema/DataTaking (CU_BT.xml) |
/gnfs/home/glast/work/INT/Scripts/Calibration/TKR (TkrNoiseAndGain, TkrNoiseOccupancy) |
/gnfs/home/glast/work/INT/Scripts/Calibration/CAL (CPT_beamtest) |
/gnfs/home/glast/work/INT/Scripts/DataTaking (end2endBT) |
Essentially you want to use end2endBT for data taking (and CU_BT.xml as the configuration file) while the charge injection tests must be performed for each module separately using the CU_TEM_xxx.xml files. Note that both the TKR and the CAL modules for the tower under test are declared in the schema file and must be powered on. When you press "select application" in the RunControl main gui you are automatically redirected into /gnfs/home/glast/work/INT/Scripts/DataTaking. Go one level up and then select Calibration to have access to the subsystem level calibration scripts.
Data live either in:
/gnfs/data/DVD |
or:
/gnfs/data/LATTE |
depending on the time of collection.
The end2end data taking configurations are listed here.