Three pieces of Hodoscope detectors for beam position monitoring are available. Two of them are identical with scintillator rod dimensions 100 x 10 x 5 mm, the third one has smaller rods (100 x 6.5 x 6.5 mm). All three detectors show significant light attenuation inside the scintillators and had to be repaired in Optical laboratories of the Charles University in Prague, Czech Republic.
Hodoscope publication in NIM: Pion_beam-hodoscope.pdf
Photomultipliers datasheet: Photomultiplier_tube_R3478.pdf
created in SimpleGeo (http://theis.web.cern.ch/theis/simplegeo/
Hodoscope drawings ppt: Hodoscope_drawings.pptx
Hodoscope drawings pdf: Hodoscope_drawings.pdf
Source file Hodoscope_drawings_source.dat
Material file materials.db
High Voltage for PMTs
How to set HV
HV values on Hodoscope nr.2: HV_for_hodoscope.pdf
vncviewer hadesdaq01:1 is main DAQ VNC
vncviewer hadesdaq01:2 is used for HODO/START
Thresholds on PaDiWa Amps
Setting the thresholds on PaDiWa front-end boards Thresholds
TDC calibration of TRB3 TRB3calibration
Look-up table (24. 4. 2014): Lookup_table_start_category.pdf
Attenuation before repair
Attenutaion length before repair was 4 - 7 cm depanding on the rod and method of measurement (cosmic muons, gamma or beta radiation).
Hodoscope nr.3 - measurement with 90Sr radioactive source: Hodoskop3_attenuation.pdf
Attenuation length after exchange of scintillator rods is cca 24 cm.
Short report about attenuation measurement after repair: after_repair.pdf
Pulse amplitudes on protons measured with osciloscope:
"Heat map" with well focused beam: Beam profile on hodoscope (Y axis):
QA over web browser:
open web browser from any machine in GSI network: hades33/mon/
or from outside: http://cerberus.x-matter.uni-frankfurt.de:8888/mon
or from WiFi
OR via SOCKS proxy setting:
1. open a ssh connection and activate 'dynamic port forwarding'
ssh -D 1080 USERNAME@lxi001.gsi.de
2. Setup SOCKS proxy in Firefox
open tab 'Network'
click on Connection 'Settings...'
activate 'Manual Proxy Configuration'
SOCKS Host: localhost Port: 1080
(ensure that all other Proxy fields are blank (or 0))
How to analyze the data (may 14 test):
QA was moved to email@example.com
0.) go to folder /analysis/tof/May14
1.) to find last 20 hld files type:
ls -ltr /store/**/*.hld(.om[0,20]L+33)
2.) run defall.sh placed in the /makeDST/ folder
3.) use analysis macro from /makeDST_ilse to analyse the files (./analysisDST name_of_the_file_from_step_1 number_of_events)
exchange of 2 modified Padiwas for lower rods
table and CalParameters
for START and HODO: calibpar_notshifted.txt
HODO Web Utilities