September 21, 2011

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Beam Parameters:

• current 140 mA
• pulse width 2 us
• rep rate 180 Hz
• E = 25 MeV

Initial Test for Verification

Run #	Beam	Dump magnet	Collimator	add coll	Hardener 1" Al	Radiator 25 um Al	Target	Comments
2515	Up 90A	In	Open	In	Yes	Out	DU cylinder	Test radiator in/out. 144632 pulses R(bottom) = 3.4E-5 n/pulse -> × 180 Hz × 60 sec/min = 0.37 n/min R(upstream) = 8.57E-4 e+/pulse
2517	Up 90A	In	Open	In	Yes	In	DU cylinder	Test radiator in/out. 0 pulses R(bottom) = 8.97E-4 n/pulse -> × 180 Hz × 60 sec/min = 9.69 n/min R(upstream) = 17.7E-3 e+/pulse About 95.2% of photons are coming from the radiator according to PS.
2519	Down 86A	In	Open	In	Yes	In	DU cylinder	Test radiator in/out. 0 pulses R(bottom) = 7.9E-4 n/pulse -> × 180 Hz × 60 sec/min = 8.53 n/min R(upstream) = 18.4E-3 e+/pulse
2520	Down 86A	In	Open	In	Yes	Out	DU cylinder	Test radiator in/out. 162652 pulses R(bottom) = 1.2E-5 n/pulse -> × 180 Hz × 60 sec/min = 0.13 n/min R(upstream) = 9.7E-4 e+/pulse About 94.7% of photons are coming from the radiator according to PS.

Production Runs

Run #	Beam	Dump magnet	Collimator	add coll	Hardener 1" Al	Radiator 25 um Al	Target	Comments
2521	Up 90A	In	Open	In	Yes	In	DU cylinder	Long production run: 0 pulses (90 minute run) Operator said the beam is really jittery R(bottom) = 0 n/pulse -> × 180 Hz × 60 sec/min = 0 n/min R(upstream) = 0 e+/pulse
25--	Down 86A	In	Open	In	Yes	In	DU cylinder	Long production run: 0 pulses (90 minute run) R(bottom) = 0 n/pulse -> × 180 Hz × 60 sec/min = 0 n/min R(upstream) = 0 e+/pulse
25--	Down 86A	In	Open	In	Yes	Out	DU cylinder	Long production run: 0 pulses (30 minute run) R(bottom) = 0 n/pulse -> × 180 Hz × 60 sec/min = 0 n/min R(upstream) = 0 e+/pulse
25--	Down 86A	In	Open	In	Yes	In	None	Long production run: 0 pulses (30 minute run) R(bottom) = 0 n/pulse -> × 180 Hz × 60 sec/min = 0 n/min R(upstream) = 0 e+/pulse

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