Difference between revisions of "09-08-2016"
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| − | =Study forward detector gamma flash with Pb curtains= | + | =Study forward detector gamma flash = |
| + | ==with Pb curtains== | ||
| + | |||
{| border="1" | {| border="1" | ||
| Run # ||D90 n Rate (Counts/pulse)|| Configuration | | Run # ||D90 n Rate (Counts/pulse)|| Configuration | ||
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|} | |} | ||
| − | = | + | |
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| + | =Shielding & Beam dump impact on gamma flash= | ||
{| border="1" | {| border="1" | ||
| Run # ||D90 n Rate (Counts/pulse)|| Configuration | | Run # ||D90 n Rate (Counts/pulse)|| Configuration | ||
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|- | |- | ||
|} | |} | ||
| + | == Tuning impact on gamma flash== | ||
| + | |||
| + | We set up a veto to create a signal that represented the second peak of the gamma flash in D270 & others. A veto pulse was created for the LED to prevent it from outputing a logic high during the first 20 ns after the beam pulse. | ||
| + | |||
| + | |||
| + | {| border="1" | ||
| + | | Run # ||D90 n Rate (Counts/pulse)|| Configuration | ||
| + | |- | ||
| + | |530 || || 11.1 MeV , 2 ns pulse width , 250 mA , '''200 Hz''' , Accelerator side collimator open to 0.2563 cm, Cell side collimator OPEN to 2 cm , radiator 3/4" IN , Target is EMPTY , D30 HV changed -1550V, All other detectors at -1700 V, removed pair spectrometer magnet, poly, and stand,Removed 3rd collimator wall, D30 has NO thick lead curtain, '''Veto OUT'''[[File:Rate2nC_5307.png|40px]] | ||
| + | |- | ||
| + | |530 || || 11.1 MeV , 2 ns pulse width , 250 mA , '''200 Hz''' , Accelerator side collimator open to 0.2563 cm, Cell side collimator OPEN to 2 cm , radiator 3/4" IN , Target is EMPTY , D30 HV changed -1550V, All other detectors at -1700 V, removed pair spectrometer magnet, poly, and stand,Removed 3rd collimator wall, D30 has NO thick lead curtain, '''Veto IN'''[[File:Rate2nC_5307.png|40px]] | ||
| + | |- | ||
| + | |} | ||
| + | |||
| + | =Thorium strip, collimator squeeze down.= | ||
=No target run= | =No target run= | ||
Revision as of 16:37, 8 September 2016
Study forward detector gamma flash
with Pb curtains
| Run # | D90 n Rate (Counts/pulse) | Configuration |
| 5302 | 11.1 MeV , 2 ns pulse width , 450 mA , 200 Hz , Accelerator side collimator open to 0.2563 cm, Cell side collimator OPEN to 2 cm , radiator 3/4" IN , Target is DU , D30 HV changed -1550V, All other detectors at -1700 V, removed pair spectrometer magnet, poly, and stand,Installed 3rd collimator wall, D30 has one 1/16" thick lead curtain 
| |
| 5303 | 11.1 MeV , 2 ns pulse width , 450 mA , 200 Hz , Accelerator side collimator open to 0.2563 cm, Cell side collimator OPEN to 2 cm , radiator 3/4" IN , Target is DU , D30 HV changed -1550V, All other detectors at -1700 V, removed pair spectrometer magnet, poly, and stand,Installed 3rd collimator wall, D30 has NO lead curtain 
|
Shielding & Beam dump impact on gamma flash
| Run # | D90 n Rate (Counts/pulse) | Configuration |
| 5300 | 11.1 MeV , 2 ns pulse width , 450 mA , 200 Hz , Accelerator side collimator open to 0.2563 cm, Cell side collimator OPEN to 2 cm , radiator 3/4" IN , Target is Empty , D30 HV changed -1550V, All other detectors at -1700 V, removed pair spectrometer magnet, poly, and stand,
| |
| 5301 | 11.1 MeV , 2 ns pulse width , 450 mA , 200 Hz , Accelerator side collimator open to '0.2563 cm, Cell side collimator OPEN to 2 cm , radiator 3/4" IN , Target is Empty , D30 HV changed -1550V, All other detectors at -1700 V, removed pair spectrometer magnet, poly, and stand, Installed 3rd collimator wall, removed line of site between D30 and cell wall collimator 
| |
| 5305 | 11.1 MeV , 2 ns pulse width , 300 mA , 90 Hz , Accelerator side collimator open to 0.2563 cm, Cell side collimator OPEN to 2 cm , radiator 3/4" IN , Target is EMPTY , D30 HV changed -1550V, All other detectors at -1700 V, removed pair spectrometer magnet, poly, and stand,Removed 3rd collimator wall, D30 has NO thick lead curtain, 
| |
| 5306 | 11.1 MeV , 2 ns pulse width , 300 mA , 200 Hz , Accelerator side collimator open to 0.2563 cm, Cell side collimator OPEN to 2 cm , radiator 3/4" IN , Target is EMPTY , D30 HV changed -1550V, All other detectors at -1700 V, removed pair spectrometer magnet, poly, and stand,Removed 3rd collimator wall, D30 has NO thick lead curtain, 
| |
| 5307 | 11.1 MeV , 2 ns pulse width , 250 mA , 200 Hz , Accelerator side collimator open to 0.2563 cm, Cell side collimator OPEN to 2 cm , radiator 3/4" IN , Target is EMPTY , D30 HV changed -1550V, All other detectors at -1700 V, removed pair spectrometer magnet, poly, and stand,Removed 3rd collimator wall, D30 has NO thick lead curtain, 
| |
| 5308 | 11.1 MeV , 2 ns pulse width , 250 mA , 200 Hz , Accelerator side collimator open to 0.2563 cm, Cell side collimator OPEN to 2 cm , radiator 3/4" IN , Target is Thorium , D30 HV changed -1550V, All other detectors at -1700 V, removed pair spectrometer magnet, poly, and stand,Removed 3rd collimator wall, D30 has NO thick lead curtain, 
| |
| 530 | 11.1 MeV , 2 ns pulse width , 450 mA , 200 Hz , Accelerator side collimator open to 0.2563 cm, Cell side collimator OPEN to 2 cm , radiator 3/4" IN , Target is ~0.5 mm x 7 cm x 4 mm Th , D30 HV changed -1550V, All other detectors at -1700 V, removed pair spectrometer magnet, poly, and stand,Installed 3rd collimator wall, D30 has NO thick lead curtain 40px |
Tuning impact on gamma flash
We set up a veto to create a signal that represented the second peak of the gamma flash in D270 & others. A veto pulse was created for the LED to prevent it from outputing a logic high during the first 20 ns after the beam pulse.
| Run # | D90 n Rate (Counts/pulse) | Configuration |
| 530 | 11.1 MeV , 2 ns pulse width , 250 mA , 200 Hz , Accelerator side collimator open to 0.2563 cm, Cell side collimator OPEN to 2 cm , radiator 3/4" IN , Target is EMPTY , D30 HV changed -1550V, All other detectors at -1700 V, removed pair spectrometer magnet, poly, and stand,Removed 3rd collimator wall, D30 has NO thick lead curtain, Veto OUT
| |
| 530 | 11.1 MeV , 2 ns pulse width , 250 mA , 200 Hz , Accelerator side collimator open to 0.2563 cm, Cell side collimator OPEN to 2 cm , radiator 3/4" IN , Target is EMPTY , D30 HV changed -1550V, All other detectors at -1700 V, removed pair spectrometer magnet, poly, and stand,Removed 3rd collimator wall, D30 has NO thick lead curtain, Veto IN
|