Linac Run Plan April 2018, Dr. McNulty
Revision as of 04:05, 31 May 2018 by Harpconn (talk | contribs) (→25mA, 100ns pulse width, 50cm from beam pipe)
Beam Line info
Machine: 25b Linac
0 port
Beam Energy: 8 MeV
Rep Rate: Max (150Hz?)
Pulse Width: 100ns
Run Plan
To find operating point
- Will use 15 OSLs from reproducibility study to make sure that dose is within acceptable range
Table
Start at 7am
Shot # Number of Pulses Number of OSLs Beam Current Dose/pulse Expected Dose/pulse 1 80 1 50 mA 2 1 mA 3 1 mA 4 1 mA 5 1 mA 6 1 mA 7 1 mA 8 1 mA 9 1 mA 10 1 mA 11 1 mA 12 1 mA 13 1 mA 14 1 mA 15 1 mA
Experiment
85 Nanodot OSLs for use (dose not include OSLs from reproducibility study)
- upper limit of OSLs is 15Gy, want to be around 7.5Gy with multiple pulses
Will talk to engineers about double pulsing and guaranteeing number of pulses and update.
Table
Shot # Number of Pulses Number of OSLs Beam Current Aluminum Brick Dose/Pulse Expected Dose/Pulse 1 1 mA Out 2 1 mA Out 3 1 mA Out 4 1 mA Out 5 1 mA Out 6 1 mA Out 7 16 mA In 8 16 mA In 9 16 mA Out 10 16 mA Out 11 16 mA Out
Absorbed Dose Information
Titanium window = 0.5mm thick. Radius = 23.813mm
Air gap between Titanium window and glass slide = 45mm
Glass slide Thickness = 1mm
5mA, 100ns pulse width, 100cm from beam pipe with Titanium window
25mA, 100ns pulse width, 100cm from beam pipe, with Titanium window
10mA, 100ns pulse width, 100cm from beam pipe, with Titanium window
100mA, 100ns pulse width, 100cm from beam pipe, with Titanium window
25mA, 100ns pulse width, 50cm from beam pipe, tungsten target with aluminum beamstop
100mA, 100ns pulse width, 25cm from beam pipe
25mA, 100ns pulse width, 25cm from beam pipe
25mA, 100ns pulse width, 50cm from beam pipe
Low Dose Line: Dose = (0.11 +/- 0.01)(PMT Counts) + (119.29 +/- 29.08)
High Dose Line: Dose = (1.54 +/- 0.06)(PMT Counts) + (1004.80 +/- 1006.24)