12 10 2012 HRRL DetectorTests: Difference between revisions

From New IAC Wiki
Jump to navigation Jump to search
← Older editNewer edit →
Foretony (talk | contribs)
18,402 edits
No edit summary
Foretony (talk | contribs)
18,402 edits
Replaced content with "=12/12/12= HRRL_Dec_12_2012Run Beam tuning FC 90 200 px =12/13/12= HRRL_Dec_13_2012Run"
Line 1: Line 1:
=2/11/12=
HRRL_12-12-12
=RunPlan=
==BeamTune==
Tune beam into zero line, max current, 10.5 MeV energy, 20 ns width, 300 Hz rep rate
For Reference, below is the the tune used on last day of July 2012 Positron run
https://wiki.iac.isu.edu/index.php/Beam_Test_Jul_27_2012#Tune
==Measure Emittance==
==Ilyusha Background measurements==
Previous Background tests during 2n correlation run
https://wiki.iac.isu.edu/index.php/2n_BKG_data
HV=1000
CFD = -12 mV
Previous run during neutron correlation experiment found 1 gamma/15 electron beam pulses
Tune beam into zero line, max current, 10.5 MeV energy, 20 ns width, 300 Hz rep rate
1.) Take a run with no shielding around Ilyusha
2.) Move Pb bricks around the scintillator to determine direction of background
3.) add shielding to accelerator
=== compare previous measurements & adjust threshold & Width ===
{| border="1" cellpadding="20" cellspacing="0"
|-
| Rate (gamma/pulse)
| Beam COnfig (E,pulse width,peak current)
|Configuration
|-
| 213/3746 =  1 /17 ||10.5 MeV : 100 ns FWHM, 5.4 mA || UNshielded illyusha scintilltor, 12 mV threshold on CFD, 255 ns CFD output pulse width (this width was sued in the 2n correlation exp)
|-
| 213/2343 = 1/11 ||10.5 MeV : 100 ns FWHM, 5.4 mA || UNshielded illyusha scintilltor, 12 mV threshold on CFD, 4 ns CFD output pulse width
|-
|220/2374 = 1/11  ||10.5 MeV : 100 ns FWHM, 5.4 mA || UNshielded illyusha scintilltor, 12 mV threshold on CFD, 100 ns CFD output pulse width
|-
| 53202/616 = nonsense  ||10.5 MeV : 100 ns FWHM, 5.4 mA || UNshielded illyusha scintilltor, 0 mV threshold on CFD, 4 ns CFD output pulse width
|-
| 794/862 = 1/1  ||10.5 MeV : 100 ns FWHM, 5.4 mA || UNshielded illyusha scintilltor, 2 mV threshold on CFD, 4 ns CFD output pulse width
|-
| 574/1213 = 1/2  ||10.5 MeV : 100 ns FWHM, 5.4 mA || UNshielded illyusha scintilltor, 4 mV threshold on CFD, 4 ns CFD output pulse width
|-
| 247/906 =  1/4 ||10.5 MeV : 100 ns FWHM, 5.4 mA || UNshielded illyusha scintilltor, 6 mV threshold on CFD, 4 ns CFD output pulse width
|-
| 662/3914 = 1/6 ||10.5 MeV : 100 ns FWHM, 5.4 mA || UNshielded illyusha scintilltor, 8 mV threshold on CFD, 4 ns CFD output pulse width
|-
| 201/1328 = 1/6.6 ||10.5 MeV : 100 ns FWHM, 5.4 mA || UNshielded illyusha scintilltor, 10 mV threshold on CFD, 4 ns CFD output pulse width
|-
|220/1580 = 1/7.2 ||10.5 MeV : 100 ns FWHM, 5.4 mA || UNshielded illyusha scintilltor, 14 mV threshold on CFD, 4 ns CFD output pulse width
|-
|250/1176 = 1/5 ||10.5 MeV : 100 ns FWHM, 5.4 mA || UNshielded illyusha scintilltor, 12 mV threshold on CFD, 4 ns CFD output pulse width
|-
|252/937 = 1/4 ||10.5 MeV : 100 ns FWHM, 5.4 mA || UNshielded illyusha scintilltor, 10 mV threshold on CFD, 4 ns CFD output pulse width
|-
|221/917 = 1/4  ||10.5 MeV : 100 ns FWHM, 5.4 mA || UNshielded illyusha scintilltor, 12 mV threshold on CFD, 4 ns CFD output pulse width
|-
|239/634 = 1/3  ||10.5 MeV : 100 ns FWHM, 5.4 mA || UNshielded illyusha scintilltor, 8 mV threshold on CFD, 4 ns CFD output pulse width
|-
|241/718 = 1/3  ||10.5 MeV : 100 ns FWHM, 5.4 mA || UNshielded illyusha scintilltor, 10 mV threshold on CFD, 4 ns CFD output pulse width
|-
|222/819 = 1/4  ||10.5 MeV : 100 ns FWHM, 5.4 mA || UNshielded illyusha scintilltor, 12 mV threshold on CFD, 4 ns CFD output pulse width
|-
| 241/1011 = 1/4 ||10.5 MeV : 100 ns FWHM, 5.4 mA || UNshielded illyusha scintilltor, 14 mV threshold on CFD, 4 ns CFD output pulse width
|-
| 246/884 = 1/4 ||10.5 MeV : 100 ns FWHM, 5.4 mA || UNshielded illyusha scintilltor, 12 mV threshold on CFD, 4 ns CFD output pulse width
|-
| 224/713 = 1/3 ||10.5 MeV : 100 ns FWHM, 5.4 mA || UNshielded illyusha scintilltor, 10 mV threshold on CFD, 4 ns CFD output pulse width
|-
| 242/561 = 1/2 ||10.5 MeV : 100 ns FWHM, 5.4 mA || UNshielded illyusha scintilltor, 8 mV threshold on CFD, 4 ns CFD output pulse width
|-
| 269/550 = 1/2 ||10.5 MeV : 100 ns FWHM, 5.4 mA || UNshielded illyusha scintilltor, 6 mV threshold on CFD, 4 ns CFD output pulse width
|-
| 254/666 = 1/3 ||10.5 MeV : 100 ns FWHM, 5.4 mA || UNshielded illyusha scintilltor, 8 mV threshold on CFD, 4 ns CFD output pulse width
|-
|250/755 = 1/3  ||10.5 MeV : 100 ns FWHM, 5.4 mA || UNshielded illyusha scintilltor, 10 mV threshold on CFD, 4 ns CFD output pulse width
|-
|233/775 = 1/3 ||10.5 MeV : 100 ns FWHM, 5.4 mA || UNshielded illyusha scintilltor, 12 mV threshold on CFD, 4 ns CFD output pulse width
|-
|205/754 = 1/3 ||10.5 MeV : 100 ns FWHM, 5.4 mA || UNshielded illyusha scintilltor, 14 mV threshold on CFD, 4 ns CFD output pulse width
|-
|204/718 = 1/3 ||10.5 MeV : 100 ns FWHM, 5.4 mA || UNshielded illyusha scintilltor, 12 mV threshold on CFD, 4 ns CFD output pulse width
|-
|214/760 = 1/3 ||10.5 MeV : 100 ns FWHM, 5.4 mA || UNshielded illyusha scintilltor, 10 mV threshold on CFD, 4 ns CFD output pulse width
|-
|390/808 = 1/2 ||10.5 MeV : 100 ns FWHM, 3.2 mA || UNshielded illyusha scintilltor, 6 mV threshold on CFD, 4 ns CFD output pulse width
|}<br>
beam current decreased from 5 to 3 mA during the measurements ; must measure beam current for each measurement.
[[File:12102012_CFDcal.jpg | 200 px]]
===Add 3 Pb Bricks to accelerator side===
We discovered that a gate vavle was slowly closing due to a gas pressure problem.  This explains why the rates were dropping above during the threshold tests.
{| border="1" cellpadding="20" cellspacing="0"
|-
| Rate (gamma/pulse)
| Beam COnfig (E,pulse width,peak current)
|Configuration
|-
| 51/3031 =  1/60  (.3 Hz) ||10.5 MeV : 100 ns FWHM, 6.8 mA, 20 Hz || 5" Pb in, UNshielded illyusha scintilltor, 10 mV threshold on CFD, 4 ns CFD output pulse width
|-
| 47/2307 = 1/50 ||10.5 MeV : 100 ns FWHM, 0 mA , RF on, 20 Hz|| 5" Pb in, UNshielded illyusha scintilltor, 10 mV threshold on CFD, 4 ns CFD output pulse width
|-
|70/3126 = 1/44 , 1/50 ||10.5 MeV : 100 ns FWHM, 6.8  mA , RF on, 20 Hz|| 5" Pb out, UNshielded illyusha scintilltor, 10 mV threshold on CFD, 4 ns CFD output pulse width
|-
| 60/2728 = 1/45 (0.43) ||10.5 MeV : 100 ns FWHM,  0 mA , RF on, 20 Hz|| 5" Pb out, UNshielded illyusha scintilltor, 10 mV threshold on CFD, 4 ns CFD output pulse width
|-
| 57/20728 = 1/363 (0.8 Hz) ||10.5 MeV : 100 ns FWHM,  6.8 mA , RF on, 300 Hz|| 5" Pb out, UNshielded illyusha scintilltor, 10 mV threshold on CFD, 4 ns CFD output pulse width
|}<br>
adding 5" of Pb between detector and accelerator decreased the rate from  to 1/60 beam pulses
The cosmic + RF noise rate = 1/50 pulses
=== Increased PMT Voltage by 100 and decrease beam current===
{| border="1" cellpadding="20" cellspacing="0"
|-
| Rate (gamma/pulse)
| Beam COnfig (E,pulse width,peak current)
|Configuration
|-
| 160/25837 = 1/161  (1.9 Hz) ||10.5 MeV : 100 ns FWHM,  1.68 mA , RF on, 300 Hz|| 5" Pb out, UNshielded illyusha scintilltor, 10 mV threshold on CFD, 4 ns CFD output pulse width
|-
| 128/22979 = 1/180 (1.7 Hz) ||10.5 MeV : 100 ns FWHM,  0 mA , RF on, 300 Hz|| 5" Pb out, UNshielded illyusha scintilltor, 10 mV threshold on CFD, 4 ns CFD output pulse width
|}<br>
==Electron/photon ratio==
Compare magnet in and out using a scintillator at the exit window of the 90 degree line.
=12/12/12=
=12/12/12=
 
[[HRRL_Dec_12_2012Run]]
Beam tuning
Beam tuning


Line 163: Line 6:


[[File:FC90_121212_A.png | 200 px]]
[[File:FC90_121212_A.png | 200 px]]
=12/13/12=
[[HRRL_Dec_13_2012Run]]

Revision as of 04:50, 14 December 2012

12/12/12

HRRL_Dec_12_2012Run Beam tuning

FC 90

12/13/12

HRRL_Dec_13_2012Run

Retrieved from "https://wiki.iac.isu.edu/index.php?title=12_10_2012_HRRL_DetectorTests&oldid=79538"