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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

High Voltage for PMTs

How to set HV

HV values on Hodoscope nr.2: HV_for_hodoscope.pdf

Thresholds on PaDiWa Amps

Setting the thresholds on PaDiWa front-end boards Thresholds

Look-up table (24. 4. 2014): Lookup_table_start_cathegory.txt

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:

Pulse amplitudes

"Heat map" with well focused beam: Beam profile on hodoscope (Y axis):

Heat map Profile

QA over web browser:

open web browser from any machine in GSI network: hades33/mon/

How to analyze the data (may 14 test):

QA was moved to (6$......-qa)

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 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)

HODO Web Utilities

Topic attachments
I Attachment Action Size Date Who Comment
HV_for_hodoscope.pdfpdf HV_for_hodoscope.pdf manage 251.1 K 05 May 2014 - 10:43 OndrejSvoboda High Voltage for Hodoscope nr.2
Hodoskop3_attenuation.pdfpdf Hodoskop3_attenuation.pdf manage 531.4 K 05 May 2014 - 12:23 OndrejSvoboda Attenuation measurement with Hodoscope nr.3 and 90Sr source
Lookup_table_start_cathegory.txttxt Lookup_table_start_cathegory.txt manage 48.6 K 06 May 2014 - 09:24 OndrejSvoboda Look-up table for start cathegory
Photomultiplier_tube_R3478.pdfpdf Photomultiplier_tube_R3478.pdf manage 215.7 K 05 May 2014 - 10:34 OndrejSvoboda Photomultiplier tube from hodoscope
Pion_beam-hodoscope.pdfpdf Pion_beam-hodoscope.pdf manage 440.0 K 05 May 2014 - 10:30 OndrejSvoboda Design and commissioning of the GSI pion beam - hodoscope description
after_repair.pdfpdf after_repair.pdf manage 260.0 K 06 May 2014 - 07:25 OndrejSvoboda 90Sr measurement of hodoscope nr. 2 after repair
hodo_pulse_amplitude.jpgjpg hodo_pulse_amplitude.jpg manage 145.1 K 05 May 2014 - 12:03 OndrejSvoboda Pulse amplitudes from Hodoscope nr.2 stripe 0, protons 2 GeV
hodoscope.jpgjpg hodoscope.jpg manage 283.6 K 06 May 2014 - 06:51 OndrejSvoboda hodoscope layout
hodoscope_heatmap.jpgjpg hodoscope_heatmap.jpg manage 7.0 K 05 May 2014 - 12:31 OndrejSvoboda Hodoscope heatmap with well focused beam
hodoscope_profile.jpgjpg hodoscope_profile.jpg manage 3.3 K 05 May 2014 - 12:37 OndrejSvoboda Beam profile in Y axis seen in Hodoscope
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Topic revision: r5 - 06 May 2014, OndrejSvoboda
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