MpiTestBeamShifterPagesSeptember2016

GIF++ 2016 Run2 (September)

New shaper boards are currently being tested. These boards have a baseline restoration can be switched on with a voltage ≠ 0 to increase the efficiency and precision of the small-diameter Monitored Drift Tubes (sMDT). The behavior of the boards is studied under the influence of gamma irradiation of different intensities in the GIF++. Tests are also conducted for two BLR setting with two threshold level settings.

Contacts

Name	Description	CERN phone	external	email
Bini	General Supervisor	16-8821	+41 75 411 8821	kos@mppNOSPAMPLEASE.mpg.de
Johannes	Shifter		16-4424	junggjo9@mppNOSPAMPLEASE.mpg.de

GIF people

Name	Description	CERN phone	external	email
Roberto Guida	head of GIF++	16-2146	+41 75 411 2146	Roberto.Guida@cernNOSPAMPLEASE.ch
Federico Ravotti	GLIMOS (safety manager)	16-5643	+41 75 411 5643	Federico.Ravotti@cernNOSPAMPLEASE.ch
Gaetan Lieb	GIF trigger responsible			gaetan.lieb@laposteNOSPAMPLEASE.net
Adrian Fabich	H4 Beamline responsible	16-0345	+41 75 411 0345	Adrian.Fabich@cernNOSPAMPLEASE.ch

Gas supply

Name	Description	CERN phone	external	email
David Jaillet	Gas point	16-7151	+41 75 411 7151	David.Jaillet@cernNOSPAMPLEASE.ch
Cyril Pochet	Gas point assistant			Cyril.Pochet@cernNOSPAMPLEASE.ch
Ernesto Regano Jimenez	pipes and lines	16-6713	+41 75 411 6713	ernesto.regano.jimenez@cernNOSPAMPLEASE.ch
Frederic Merlet	pipes assistant	16-4089	+41 75 411 4089	frederic.merlet@cernNOSPAMPLEASE.ch

Access and Passwords

PC	hostname	username	password
control room	etpdaq3	etpdaq	default daq
DAQ	etpdaq3	etpdaq	default daq
slowcontrol for gas / HV	pcatlasmdtsc	mpisc	*

Test Setup

insert description of the setup

Run

We take data with two different parameter settings:

- With BLR current and nominal threshold for the ASD. (mt-online-thr30) - Without BLR current and 90% of the nominal threshold for the ASD. (mt-online-blr-thr20)

One starts the data taking by entering:

 take_data.exe <config file> <number of events to take> 

Start data taking for both settings at a time and adjust the number of events to take to the expected trigger rate. One run should not last longer than 30min. E.g.

take_data.exe mt-online-thr30 20000; take_data.exe mt-online-blr-thr20 20000 

Setting up the source

The source can be shielded by three absorption layers A, B and C. Each layer has three different filters. The resulting attenuation is the product of the layer settings.

Filter	A	B	C
1	1.0	1.0	1.0
2	10.0	1.468	2.154
3	100.0	100.0	4.642

The resulting total attenuations are:

A1	B1	C1	a= 1.0, b= 1.0, c= 1.0	1.0e+00
A1	B2	C1	a= 1.0, b= 1.5, c= 1.0	1.5e+00
A1	B1	C2	a= 1.0, b= 1.0, c= 2.2	2.2e+00
A1	B2	C2	a= 1.0, b= 1.5, c= 2.2	3.3e+00
A1	B1	C3	a= 1.0, b= 1.0, c= 4.6	4.6e+00
A1	B2	C3	a= 1.0, b= 1.5, c= 4.6	6.9e+00
A2	B1	C1	a= 10.0, b= 1.0, c= 1.0	1.0e+01
A2	B2	C1	a= 10.0, b= 1.5, c= 1.0	1.5e+01
A2	B1	C2	a= 10.0, b= 1.0, c= 2.2	2.2e+01
A2	B2	C2	a= 10.0, b= 1.5, c= 2.2	3.3e+01
A2	B1	C3	a= 10.0, b= 1.0, c= 4.6	4.6e+01
A2	B2	C3	a= 10.0, b= 1.5, c= 4.6	6.9e+01
A1	B3	C1	a= 1.0, b= 100.0, c= 1.0	1.0e+02
A3	B1	C1	a= 100.0, b= 1.0, c= 1.0	1.0e+02
A3	B2	C1	a= 100.0, b= 1.5, c= 1.0	1.5e+02
A1	B3	C2	a= 1.0, b= 100.0, c= 2.2	2.2e+02
A3	B1	C2	a= 100.0, b= 1.0, c= 2.2	2.2e+02
A3	B2	C2	a= 100.0, b= 1.5, c= 2.2	3.3e+02
A1	B3	C3	a= 1.0, b= 100.0, c= 4.6	4.6e+02
A3	B1	C3	a= 100.0, b= 1.0, c= 4.6	4.6e+02
A3	B2	C3	a= 100.0, b= 1.5, c= 4.6	6.9e+02
A2	B3	C1	a= 10.0, b= 100.0, c= 1.0	1.0e+03
A2	B3	C2	a= 10.0, b= 100.0, c= 2.2	2.2e+03
A2	B3	C3	a= 10.0, b= 100.0, c= 4.6	4.6e+03
A3	B3	C1	a= 100.0, b= 100.0, c= 1.0	1.0e+04
A3	B3	C2	a= 100.0, b= 100.0, c= 2.2	2.2e+04
A3	B3	C3	a= 100.0, b= 100.0, c= 4.6	4.6e+04

To change the filter setting, press the according buttons on the control panel in the control room and apply with APP. The filters take a bit of time to change, as shown on the display. Start a new run after all filters are in place!

Setting up the trigger

Depending on the type of run (beam or rate), the cabling of the rack in the supply area has to be changed. insert precise instructions

Taking data

1) connect to DAQ computer etpdaq3: ssh -Y etpdaq@etpdaq3

2) get the current session and log off everyone else with screen -r -d

If necessary, navigate to /home/etpdaq/GIF++/2016/.

3) start the run by executing the command:

 take_data.exe <config file> <number of events to take> 

N.B. The last argument is the number of events you want to take.

4) For checking the progress of the run:

• connect to etpdaq3 in another terminal
• navigate to /home/etpdaq/GIF++/2016/data/
• read the current run log by executing

 tail -f RUN_<number>/run_<number>.log 

5) Make an entry in the shared log spreadsheet. http://bit.ly/1sUY6Up

Checking the HV supply

Connect to the slowcontrol computer and execute the monitoring script:

ssh mpisc@pcatlasmdtsc
watch ./data/mpisc05/SlowControl/data/slowcontrol_check.py 

All voltages should be at 2730V. The current depends mailny on the gamma irradiation and should therefore be inverse proportional to the absorption factor.

Data QA

Connect to etpdaq@etpdaq3

Go to: /home/etpdaq/GIF++/2016/offline/2016

To analyze the data, move the resulting file, and open it, you can run the command:

source analyze.sh <run_number>

This short script issues (in sequence):

./bin/mt-offline -r ../../data/RUN_<run_number>/run_<run_number>.raw -process NULL GIF_2016.calib 1 1000000000000000
sudo mv tmp.root ../../data/RUN_<run_number>run_<run_number>.root
root -l ../../data/RUN_<run_number>/run_.root

In a new TBrowser, check the hit distribution (h_hit_distribution_1) to see whether there are any dead cards. There will be some dead channels (12, 19, 22, 24, 36, 48, 55, 59, 60, 71, 72, 83, 84, 95, 96), but all other channels should have data/hits in them. Also check h_t_drift_chamber_1. This should show a standard drift time spectrum.

An example of the plots from run 203 (source off) and 214 (source on) can be seen here (click to see the pdf):

Drift time plot (without source)	Hit distribution (without source)	Zoomed hit distribution (without source)

Drift time plot (with source)	Hit distribution (with source)	Zoomed hit distribution (with source)

List of Links:

• SPS Page 1: https://op-webtools.web.cern.ch/vistar/vistars.php?usr=SPS1
• MDT Beam Time Overview Page: https://twiki.cern.ch/twiki/bin/view/Main/MpiTestBeamShifterPages
• GIF elog: http://noite01.cern.ch/GIFOperation/?id=15

-- KorbinianRalfSchmidtSommerfeld - 2016-09-27