Linac Run Plan April 2018, Dr. McNulty

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Beam Line info

0 degree line

Titanium window = 0.5mm thick. Radius = 23.813mm

Air gap between Titanium window and glass slide = 45mm

Glass slide Thickness = 1mm

Run Plan

To find operating point

- Will use 15 OSLs from reproducibility study to make sure that dose is within acceptable range

Shot # Start Time End Time Number of Pulses Number of OSLs Beam Current
1 7:00am 7:05am 80 1 50 mA
2 7:10am 7:15am ___ 1 mA
3 7:20am 7:25am ___ 1 mA
4 7:30am 7:35am ___ 1 mA
5 7:40am 7:45am ___ 1 mA
6 7:50am 7:55am ___ 1 mA
7 8:00am 8:05am ___ 1 mA
8 8:10am 8:15am ___ 1 mA
9 8:20am 8:25am ___ 1 mA
10 8:30am 8:35am ___ 1 mA
11 8:40am 8:45am ___ 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

Machine: 25b Linac

Beam Energy: 8 MeV

Rep Rate: Max (150Hz)

Will talk to engineers about double pulsing and guaranteeing number of pulses and update.

Shot # Start Time End Time Number of Pulses Number of OSLs Beam Current Aluminum Brick
1 7:00am 7:05am 2 1 mA Out
2 7:10am 7:15am 2 1 mA Out
3 7:20am 7:25am 2 1 mA Out
4 7:30am 7:35am 2 1 mA Out
5 7:40am 7:45am 2 1 mA Out
6 7:50am 7:55am 2 1 mA Out
7 8:00am 8:05am 2 16 mA In
8 8:10am 8:15am 2 16 mA In
9 8:20am 8:25am 2 16 mA Out
10 8:30am 8:35am 2 16 mA Out
11 8:40am 8:45am 2 16 mA Out


Highest single pulse simulated parameters are 25mA with 100ns pulse width.

Absorbed Dose Information

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


Thesis

May 31st 2018 - 25b 0 degree port