September 20, 2011

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summary what was been done

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

Run #	Beam	Dump magnet	Collimator	add coll	Hardener 1" Al	Radiator 10 um Al	Target	Comments
2502	Up 90A	In	Open	In	Yes	In	DU cylinder	Test radiator in/out. 120664 pulses R(bottom) = 0.0012 n/pulse -> ×180×60 = 12.9 n/min R(upstream) = 0.0272 e+/pulse
2503	Up 90A	In	Open	In	Yes	Out	DU cylinder	Test radiator in/out. 121258 pulses R(bottom) = 0 n/pulse R(upstream) = 0.00091 e+/pulse About 97% of photons are coming from the radiator according to PS. Very Good
2504	Down 86A	In	Open	In	Yes	In	DU cylinder	Test radiator in/out. R(bottom) = 0.00137 n/pulse -> ×180×60 = 14.8 n/min R(upstream) = 0.0319 e+/pulse
2505	Down 86A	In	Open	In	Yes	Out	DU cylinder	Test radiator in/out. 122247 pulses R(bottom) = 0 n/pulse R(upstream) = 0.000908 e+/pulse About 97% of photons are coming from the radiator according to PS. Very Good

Production runs

Run #	Beam	Dump magnet	Collimator	add coll	Hardener 1" Al	Radiator 10 um Al	Target	Comments
2506	Up 90A	In	Open	In	Yes	In	DU cylinder	Long production run: 972556 pulses Operator said the beam is really jittery R(bottom) = 0.0013 n/pulse -> ×180×60 = 14.0 n/min R(upstream) = 0.0258 e+/pulse
2507	Down 86A	In	Open	In	Yes	In	DU cylinder	Long production run: 973769 pulses R(bottom) = 0.001298 n/pulse -> ×180×60 = 14.0 n/min R(upstream) = 0.0288 e+/pulse
2508	Down 86A	In	Open	In	Yes	Out	DU cylinder	Long production run: pulses R(bottom) = 0.00 n/pulse -> ×180×60 = .0 n/min R(upstream) = 0.0 e+/pulse

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