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| − | =2/11/12=
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| − | HRRL_12-12-12
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| − | =RunPlan=
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| − |
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| − | ==BeamTune==
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| − |
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| − | Tune beam into zero line, max current, 10.5 MeV energy, 20 ns width, 300 Hz rep rate
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| − | For Reference, below is the the tune used on last day of July 2012 Positron run
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| − | https://wiki.iac.isu.edu/index.php/Beam_Test_Jul_27_2012#Tune
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| − | ==Measure Emittance==
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| − | ==Ilyusha Background measurements==
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| − | Previous Background tests during 2n correlation run
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| − | https://wiki.iac.isu.edu/index.php/2n_BKG_data
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| − | HV=1000
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| − | CFD = -12 mV
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| − | Previous run during neutron correlation experiment found 1 gamma/15 electron beam pulses
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| − | Tune beam into zero line, max current, 10.5 MeV energy, 20 ns width, 300 Hz rep rate
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| − | 1.) Take a run with no shielding around Ilyusha
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| − |
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| − | 2.) Move Pb bricks around the scintillator to determine direction of background
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| − | 3.) add shielding to accelerator
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| − | === compare previous measurements & adjust threshold & Width ===
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| − | {| border="1" cellpadding="20" cellspacing="0"
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| − | |-
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| − | | Rate (gamma/pulse)
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| − | | Beam COnfig (E,pulse width,peak current)
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| − | |Configuration
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| − | |-
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| − | | 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)
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| − | |-
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| − | | 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
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| − | |-
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| − | |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
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| − | |-
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| − | | 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
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| − | |-
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| − | | 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
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| − | |-
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| − | | 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
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| − | |-
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| − | | 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
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| − | |-
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| − | | 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
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| − | |-
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| − | | 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
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| − | |-
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| − | |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
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| − | |-
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| − | |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
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| − | |-
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| − | |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
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| − | |-
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| − | |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
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| − | |-
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| − | |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
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| − | |-
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| − | |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
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| − | |-
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| − | |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
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| − | |-
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| − | | 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
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| − | |-
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| − | | 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
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| − | |-
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| − | | 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
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| − | |-
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| − | | 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
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| − | |-
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| − | | 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
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| − | |-
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| − | | 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
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| − | |-
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| − | |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
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| − | |-
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| − | |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
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| − | |-
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| − | |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
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| − | |-
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| − | |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
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| − | |-
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| − | |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
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| − | |-
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| − | |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
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| − | |}<br>
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| − | beam current decreased from 5 to 3 mA during the measurements ; must measure beam current for each measurement.
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| − | [[File:12102012_CFDcal.jpg | 200 px]]
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| − |
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| − | ===Add 3 Pb Bricks to accelerator side===
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| − | 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.
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| − | {| border="1" cellpadding="20" cellspacing="0"
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| − | |-
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| − | | Rate (gamma/pulse)
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| − | | Beam COnfig (E,pulse width,peak current)
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| − | |Configuration
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| − | |-
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| − | | 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
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| − | |-
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| − | | 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
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| − | |-
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| − | |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
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| − | |-
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| − | | 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
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| − | |-
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| − | | 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
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| − | |}<br>
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| − | adding 5" of Pb between detector and accelerator decreased the rate from to 1/60 beam pulses
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| − | The cosmic + RF noise rate = 1/50 pulses
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| − | === Increased PMT Voltage by 100 and decrease beam current===
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| − |
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| − | {| border="1" cellpadding="20" cellspacing="0"
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| − | |-
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| − | | Rate (gamma/pulse)
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| − | | Beam COnfig (E,pulse width,peak current)
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| − | |Configuration
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| − | |-
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| − | | 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
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| − | |-
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| − | | 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
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| − |
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| − | |}<br>
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| − | ==Electron/photon ratio==
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| − | Compare magnet in and out using a scintillator at the exit window of the 90 degree line.
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| | =12/12/12= | | =12/12/12= |
| − | | + | [[HRRL_Dec_12_2012Run]] |
| | Beam tuning | | Beam tuning |
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| Line 163: |
Line 6: |
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| | [[File:FC90_121212_A.png | 200 px]] | | [[File:FC90_121212_A.png | 200 px]] |
| | + | |
| | + | =12/13/12= |
| | + | [[HRRL_Dec_13_2012Run]] |
