This shows you the differences between two versions of the page.
Both sides previous revision Previous revision Next revision | Previous revision Next revision Both sides next revision | ||
playground:pulsing [2009/04/15 16:21] 132.235.40.233 Add last modified line. |
playground:pulsing [2010/11/10 06:16] 75.105.208.104 |
||
---|---|---|---|
Line 12: | Line 12: | ||
- Adjust 2X for maximum current for the maximum current. You usually need to adjust both 2Y and 2X together to find the maximum. | - Adjust 2X for maximum current for the maximum current. You usually need to adjust both 2Y and 2X together to find the maximum. | ||
- Change to f/2. Adjust the chopper phasing for maximum current. The beam current should drop by a factor of 2 if you are on the proper peak. For best current tune both the 2X and chopper phasing. | - Change to f/2. Adjust the chopper phasing for maximum current. The beam current should drop by a factor of 2 if you are on the proper peak. For best current tune both the 2X and chopper phasing. | ||
- | - Adjust chopper phase for maximum current on the Output Meter. | + | - Return to f/1 |
+ | - Adjust chopper phase for maximum beam current. | ||
- Turn "chopper power" on. | - Turn "chopper power" on. | ||
- Turn buncher on. | - Turn buncher on. | ||
- | - Bring amplifier plate to 1 keV for for deuteron or protons, 0.2-0.4 keV for He-3 and He-4, and 0.5-0.75 keV for Li-7. | + | - Bring amplifier plate to 1 kV for for deuteron or protons, 0.2-0.4 kV for He-3 and He-4, and 0.5-0.75 kV for Li-7. |
- Adjust buncher phase for maximum current. | - Adjust buncher phase for maximum current. | ||
- | - Peak buncher output current with "buncher output" by cranking the tuning knob. | + | - Adjust buncher tuning for peak output current by cranking the tuning knob. |
- Get high energy end of the accelerator going. | - Get high energy end of the accelerator going. | ||
- Adjust low energy steerers to maximize the beam. Try to run the steerers as low as possible and avoid doglegs. | - Adjust low energy steerers to maximize the beam. Try to run the steerers as low as possible and avoid doglegs. | ||
Line 24: | Line 25: | ||
- Make sure proper doors are closed, and target cooling, etc. are on and take the beam into the target area. | - Make sure proper doors are closed, and target cooling, etc. are on and take the beam into the target area. | ||
- Adjust H.E. steering, quads, tweaking magnet, etc. to maximize beam current. | - Adjust H.E. steering, quads, tweaking magnet, etc. to maximize beam current. | ||
- | - Examine beam pick-off repetition rate; if you have adjusted the chopper and buncher properly it should read 500,000 at f/1. | + | - Adjust auxiliary width for beam current; this will affect both beam current and timing and will need to be set when the final timing is set. |
+ | - Examine beam pick-off repetition rate; if you have adjusted the chopper and buncher properly it should read 5,000,000 at f/1. | ||
- If you are using a gold foil: | - If you are using a gold foil: | ||
- put the cup in, then | - put the cup in, then |