03-30-2015

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Run # (multihit data) Description
4504 Al radiator in, DU cyl. target in, Current = 800 mA width = 100 ps, Ee = 10.5 MeV, rep. rate = 200Hz, slits are at 351. LED = 10 mV (all), LED pulse width = 40 ns (all)

N(gamma/pulse, TDC[1][8]) = 1/13, N(n/pulse, TDC[1][8]) = 1/391 = 0.00255

N(gamma/pulse, TDC[1][10]) = 1/10, N(n/pulse, TDC[1][10]) = 1/378 = 0.00266

4505 Al radiator in, DU cyl. target in, Current = 800 mA width = 100 ps, Ee = 10.5 MeV, rep. rate = 200Hz, slits are at 351. LED = 20 mV (all), LED pulse width = 40 ns (all)

N(gamma/pulse, TDC[1][8]) = 1/18, N(n/pulse, TDC[1][8]) = 1/1158 = 0.00086

N(gamma/pulse, TDC[1][10]) = 1/14, N(n/pulse, TDC[1][10]) = 1/922 = 0.0011

4506 Al radiator in, DU cyl. target in, Current = 800 mA width = 100 ps, Ee = 10.5 MeV, rep. rate = 200Hz, slits are at 351. LED = 5 mV (all), LED pulse width = 40 ns (all)

N(gamma/pulse, TDC[1][8]) = 1/13, N(n/pulse, TDC[1][8]) = 1/259 = 0.0039

N(gamma/pulse, TDC[1][10]) = 1/9, N(n/pulse, TDC[1][10]) = 1/245 = 0.0041

4507 Al radiator in, DU cyl. target in, Current = 800 mA, LINAC pulse width = 100 ps, Ee = 10.5 MeV, rep. rate = 200Hz, slits are at 351. Back to LED threshold = 10 mV (all), LED pulse width = 40 ns (all). LED is in updating mode. Pair spectrometer Det @ 15 mV threshold. Production run.

Positron rate by visual scaler = 120 e+/min

N(gamma/pulse, TDC[1][8], Det #1 top) = 1/15, N(n/pulse, TDC[1][8], Det #1 top) = 0.0023

N(gamma/pulse, TDC[1][10], Det #3 top) = 1/11

N(n/pulse, TDC[1][3], Det #4 bottom) = 0.0037

N(n/pulse, TDC[1][9], Det #1 bottom) = 0.0021

N(n/pulse, TDC[1][0], Det #2 top) = 0.0021

N(n/pulse, TDC[1][10], Det #3 top) = 0.0022

N(n/pulse, TDC[1][4], Det #5 upstream) = 0.0005

N(n/pulse, TDC[1][14], Det #6 upstream) = 0.0012

4508 Al radiator in, DU cyl. target in, Current = 800 mA, LINAC pulse width = 100 ps, Ee = 10.5 MeV, rep. rate = 200Hz, slits are at 351. Back to LED threshold = 10 mV (all), LED pulse width = 40 ns (all). LED is in updating mode. Pair spectrometer Det @ 15 mV threshold. Production run.

Positron rate by visual scaler = 125, 133, 147, 119, 110, 125 e+/min

N(gamma/pulse, TDC[1][0], Det #2 top) = 1/4, N(n/pulse, TDC[1][0], Det #2 top) = 0.0025

N(gamma/pulse, TDC[1][1], Det #2 bottom) = 1/4, N(n/pulse, TDC[1][1], Det #2 bottom) = 0.0015

N(gamma/pulse, TDC[1][8], Det #1 top) = 1/15, N(n/pulse, TDC[1][8], Det #1 top) = 0.0023

N(gamma/pulse, TDC[1][10], Det #3 top) = 1/11

N(n/pulse, TDC[1][3], Det #4 bottom) = 0.0043, N(n/pulse, TDC[1][2], Det #4 top) = 0.004

N(n/pulse, TDC[1][9], Det #1 bottom) = 0.0024

N(n/pulse, TDC[1][0], Det #2 top) = 0.0024

N(n/pulse, TDC[1][10], Det #3 top) = 0.0024

N(n/pulse, TDC[1][4], Det #5 upstream) = 0.0005

N(n/pulse, TDC[1][14], Det #6 upstream) = 0.0013

4509 Al radiator in, DU cyl. target in, Current = 800 mA, LINAC pulse width = 100 ps, Ee = 10.5 MeV, rep. rate = 200Hz, slits are at 351. Back to LED threshold = 10 mV (all), LED pulse width = 40 ns (all). LED is in updating mode. Pair spectrometer Det @ 15 mV threshold. Production run.

Positron rate by visual scaler = e+/min

N(gamma/pulse, TDC[1][0], Det #2 top) = 1/3.8, N(n/pulse, TDC[1][0], Det #2 top) = 0.0022

N(gamma/pulse, TDC[1][1], Det #2 bottom) = 1/4.2, N(n/pulse, TDC[1][1], Det #2 bottom) = 0.0014

N(gamma/pulse, TDC[1][8], Det #1 top) = 1/14.7, N(n/pulse, TDC[1][8], Det #1 top) = 0.0022

N(gamma/pulse, TDC[1][10], Det #3 top) = 1/10.4

N(n/pulse, TDC[1][3], Det #4 bottom) = , N(n/pulse, TDC[1][2], Det #4 top) =

N(n/pulse, TDC[1][9], Det #1 bottom) =

N(n/pulse, TDC[1][0], Det #2 top) =

N(n/pulse, TDC[1][10], Det #3 top) =

N(n/pulse, TDC[1][4], Det #5 upstream) =

N(n/pulse, TDC[1][14], Det #6 upstream) =

4510 Al radiator in, DU cyl. target in, Current = 800 mA, LINAC pulse width = 100 ps, Ee = 10.5 MeV, rep. rate = 200Hz, slits are at 351. Back to LED threshold = 10 mV (all), LED pulse width = 40 ns (all). LED is in updating mode. Pair spectrometer Det @ 15 mV threshold. Production run.

Positron rate by visual scaler = e+/min

N(gamma/pulse, TDC[1][0], Det #2 top) = , N(n/pulse, TDC[1][0], Det #2 top) =

N(gamma/pulse, TDC[1][1], Det #2 bottom) = , N(n/pulse, TDC[1][1], Det #2 bottom) =

N(gamma/pulse, TDC[1][8], Det #1 top) = , N(n/pulse, TDC[1][8], Det #1 top) =

N(gamma/pulse, TDC[1][10], Det #3 top) =

N(n/pulse, TDC[1][3], Det #4 bottom) = , N(n/pulse, TDC[1][2], Det #4 top) =

N(n/pulse, TDC[1][9], Det #1 bottom) =

N(n/pulse, TDC[1][0], Det #2 top) =

N(n/pulse, TDC[1][10], Det #3 top) =

N(n/pulse, TDC[1][4], Det #5 upstream) =

N(n/pulse, TDC[1][14], Det #6 upstream) = 

Unplugged Beam pulse/trigger/TDC start during run
4511 Al radiator in, DU cyl. target in, Current = 800 mA, LINAC pulse width = 100 ps, Ee = 10.5 MeV, rep. rate = 200Hz, slits are at 351. Back to LED threshold = 10 mV (all), LED pulse width = 40 ns (all). LED is in updating mode. Pair spectrometer Det @ 15 mV threshold. Production run.

Positron rate by visual scaler = e+/min

N(gamma/pulse, TDC[1][0], Det #2 top) = , N(n/pulse, TDC[1][0], Det #2 top) =

N(gamma/pulse, TDC[1][1], Det #2 bottom) = , N(n/pulse, TDC[1][1], Det #2 bottom) =

N(gamma/pulse, TDC[1][8], Det #1 top) = , N(n/pulse, TDC[1][8], Det #1 top) =

N(gamma/pulse, TDC[1][10], Det #3 top) =

N(n/pulse, TDC[1][3], Det #4 bottom) = , N(n/pulse, TDC[1][2], Det #4 top) =

N(n/pulse, TDC[1][9], Det #1 bottom) =

N(n/pulse, TDC[1][0], Det #2 top) =

N(n/pulse, TDC[1][10], Det #3 top) =

N(n/pulse, TDC[1][4], Det #5 upstream) =

N(n/pulse, TDC[1][14], Det #6 upstream) = 

Did not observe a time shift in Detector 1 top compared to run 4508, continuing to take data


Discriminator Threshold study

Al radiator in Current = 800 mA width = 100 ps, Ee = 10.5 MeV, rep. rate = 200Hz, slits are at 351. LED = 10 mV (all), LED pulse width = 40 ns (all) Target = DU rod

Run # LED (mv) Gammas/pulse Neutrons/Pulse
1 top [8] 2 top [0] 3 top [10] 4 top [2] 1 top [8] 2 top [0] 3 top [10] 4 top [2]
4504 10 1/13 1/10 1/391 1/378
4505 20 1/18 1/14 1/1158 1/922
4506 5 mV 1/13 1/9 1/259 1/245

Production running on Du rod

Al radiator in Current = 800 mA width = 100 ps, Ee = 10.5 MeV, rep. rate = 200Hz, slits are at 351. LED = 10 mV (all), LED pulse width = 40 ns (all) Target = DU rod 10 mV updating mode. Pair spectrometer Det @ 15 mV threshold. Production run.


Run # e^+/min Gammas/pulse Neutrons/Pulse
1 top [8] 2 top [0] 3 top [10] 4 top [2] 1 top [8] 2 top [0] 3 top [10] 4 top [2]
4507 120 1/15 1/11 1/434 1/476 1/454
4508 125 1/15 1/4 1/11 Photon peak at 323.3 ns for [8]
4509 1/15 1/4 1/11
4510 1/12 1/4 1/9 1/13 1/387 1/371 1/409 1/228 unplugged gun pulse around event 300k
4511 1/14 Photon peak at 323 ns for [8]


2nCor_44

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