Hodoscope detectors

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

Hodoscope drawings

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

VNCs

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

After repair

Attenuation length after exchange of scintillator rods is cca 24 cm.

Short report about attenuation measurement after repair: after_repair.pdf

Beam results

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: http://cerberus.x-matter.uni-frankfurt.de:3060/mon

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
Edit->Preferences->Advanced
open tab 'Network'
click on Connection 'Settings...'
activate 'Manual Proxy Configuration'
setup:
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 hadestof@lxhadeb06.gsi.de

0.) go to folder /analysis/tof/May14

1.) to find last 20 hld files type:

zsh

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)

Beamtime info

August14

exchange of 2 modified Padiwas for lower rods

8->3

1->16

LookUp table and CalParameters for START and HODO: calibpar_notshifted.txt

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