September 19, 2011

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Summary of the day

• current 120 mA
• pulse width 2 us
• rep rate 180 Hz
• E = 25 MeV

Run #	Beam	Dump magnet	Collimator	Hardener 1" Al	Radiator 10 um Al	Target	Comments
2479	Up 90A	In	Open	Yes	In	DU cylinder	Beam check-in run. Additional collimator in R(beam down) = 0.000689 n/pulse R(upstream) = 0.01667 = e+/pulse
2480	Up 90A	In	Open	Yes	Out	DU cylinder	Beam check-in run. R(beam down) = 0.000018 n/pulse R(upstream) = 0.00116 = e+/pulse About 93% of photons are coming from the radiator according to PS. Good
2482	Down 86A	In	Open	Yes	In	DU cylinder	Beam check-in run. R(beam down) = 0.000717 n/pulse R(upstream) = 0.0164 = e+/pulse
2483	Down 86A	In	Open	Yes	Out	DU cylinder	Beam check-in run. Beam lost. R(beam down) n/pulse R(upstream) e+/pulse

• current 160 mA
• rep rate 180 Hz

Run #	Beam	Dump magnet	Collimator	Hardener 1" Al	Radiator 10 um Al	Target	Comments
2488	Down 86A	In	Open	Yes	Out	DU cylinder	Beam returned without VS. Beam check-in run. Additional collimator in R(beam down) = 0 n/pulse R(upstream) = 0.00116 = e+/pulse
2489	Down 86A	In	Open	Yes	In	DU cylinder	Beam check-in run. R(beam down) = 0.00057 n/pulse R(upstream) = 0.0129 = e+/pulse About 91% of photons are coming from the radiator according to PS. Good
2490	Up 90A	In	Open	Yes	In	DU cylinder	Beam off.
2491	Up 90A	In	Open	Yes	In	DU cylinder	Beam check-in run. R(beam down) = 0.000569 n/pulse R(upstream) = 0.01198 = e+/pulse
2492	Up 90A	In	Open	Yes	Out	DU cylinder	Beam check-in run. R(beam down) = 0 n/pulse R(upstream) = 0.00080 = e+/pulse About 93% of photons are coming from the radiator according to PS. Good

Good beam, good turning. So there are production runs

Run #	Beam	Dump magnet	Collimator	add coll	Hardener 1" Al	Radiator 10 um Al	Target	Comments
2494	Up 90A	In	Open	In	Yes	In	DU cylinder	Long production run 190006 pulses R(beam down) = 0.00063 n/pulse -> ×180×60 = 6.8 n/min R(upstream) = 0.0142 = e+/pulse

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