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campaneros edited this page Feb 28, 2021 · 82 revisions

Table of Contents

Check List

  1. BEFORE opening the box, check if the HV is OFF, otherwise turn it OFF
  2. Always put an eye on the chiller conditions in the GUI (localhost:8888). COOLING OK and green
  3. if a LED run:
  • is the PULSER ON (LED ON red button in the GUI)?
  • is the HV ON and set at the nominal value?
  • is the LEDSCAN checked if starting a LEDSCAN run?
  1. if a SOURCE run:
  • is the LED PULSER OFF (LED OFF yellow button in the GUI)?
  • is the HV ON and set at the nominal value?
  • is the holder put in the correct position (ie NE corner when looking from the door and above the PMT)
  • am I using the correct hole in the holder for the size of the crystal?
  • is the source in the box?
  1. After the processing finished, always validate the run on airtable if the run is good

Instructions

Slow Control DCS GUI (Cooling + Temperature monitor)

Open firefox
Go to page localhost:8888
IMPORTANT DO THIS ONLY IF THERE IS NO OPEN FIREFOX WITH A GUI ALREADY RUNNING. 2 GUIS CONFLICT!!
DO NOT UNPLUG/PLUG ARDUINOS OR OTHER USB CABLES UNLESS YOU KNOW WHAT YOU'RE DOING, OTHERWISE PORT NAMES WILL BE CHANGED!
Currently:
/dev/sensor_1 External temperature+humidity sensors
/dev/sensor_0 Internal temperature+humidity sensors
/dev/ttyUSB0 Lauda Chiller
/dev/usbtmc0 LED Pulser

To check temperature graph:
https://thingspeak.com/channels/781520

Remember: Temperature should be ~22.3 degree when external temperature is 26 (and chiller is at 18.5).

Chiler

Chiller lies below the box (on the right side from the door).
The chiller temperature is set at 18.5 degrees. Pump flow config is set at 3

The status of the chiller is reported in the GUI. Normally the cooling should be COOLING OK and green

Every 2 weeks please check the level of the water (please use only demineralised water to refill, which should be close to the chiller)

The chiller should be kept ON unless there will be no measurements for more than 2 weeks. To turn ON/OFF simply press the COOLING button, which should become yellow (COOLING OFF). To turn back ON simply press the button again, which after few seconds should become green (COOLING OK)

IMPORTANT DO NOT CHANGE PARAMS UNLESS YOU KNOW WHAT YOU'RE DOING

LED

Push the yellow LED OFF button on the DCS GUI. The button will become RED and LED ON. Push again to switch OFF
Parameters: 20 KHz, High Value: 4.22V, Low Value, 0V, Length: 60ns
IMPORTANT DO NOT CHANGE PARAMS UNLESS YOU KNOW WHAT YOU'RE DOING. JUST SWITCH ON/OFF FOR NORMAL OP
LED Voltage Scan is now done using DRS4DAQ with the corresponding switch

HV

NIM power supply. Nominal voltage is 1500V, current ~350mA
**** 1450V new setting since 2021/02/01, giving PE ~16 ADC counts. @1350V PE signal very small
IMPORTANT DO NOT CHANGE CONFIG UNLESS YOU KNOW WHAT YOU'RE DOING. JUST SWITCH ON/OFF FOR NORMAL OP
REMEMBER TO CHECK THE HV BEFORE OPENING THE BOX!!
The NIM power supply is the one on the left in the NIM crate below the box
For the moment the HV is not controlled by the GUI, but should be operated manually

Crystal holder

The holder is a white plastic object with 4 holes for different sizes of the crystal (going from small (2.4mm thickness to 3.75mm) The 4th size is never used.

The holder is squared and can be placed in any orientation on the PMT support. By convention we place the crystal in the North East (NE) corner when is seen from above the PMT (and clearly from the door box).

Always rotate the holder such as the crystal lies in this position on the PMT photocathode

DRS4DAQ

~/startDRS4DAQ.sh

IMPORTANT LED SHOULD BE TURNED ON/OFF MANUALLY FROM DCS GUI (ALSO FOR LEDSCAN)

Typical configuration:
LEDSCAN: Nevt 100000 Spill 20000 Interspill 2s LEDSCAN checked
SOURCE: Nevt 50000 Spill 10000 Interspill 0 LEDSCAN not checked

Please respect the convention for the name:
LED: eg LED-20191113-SCAN-4, LED-YYYYDDMM-SCAN-NRUN
SOURCE: eg BAR000040-WS3-NW-NC-P2-SL-H2-20191113-1, remember H2 is the hole in the support for square crystal (geo2), H1 for small crystals (geo3), H3 for big crystals (geo1)

Better to "Exit" if changing RUN configuration (eg from LED to SOURCE or viceversa) and restart DRS4DAQ

Look at the plots of the airtable link from outside pccmsdaq01

Make an ssh tunnel to pccmsdaq01: ssh -L8888:10.0.0.44:80 cmsdaq@pccmsdaq01.roma1.infn.it plots can be seen under: 127.0.0.1:8888 (note that the last link of the directory containing the plots doesn't work, one needs to re-add the ":8888" port)

To connect to udoo: ssh -p2222 -L8888:10.0.0.44:80 cmsdaq@pccmsdaq01.roma1.infn.it

(or, to simultaneously look at the plots, can make: ssh -p2222 -L8888:10.0.0.44:80 cmsdaq@pccmsdaq01.roma1.infn.it)

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