User Tools
playground:sputter
Differences
This shows you the differences between two versions of the page.
| Both sides previous revision Previous revision | Next revision Both sides next revision | ||
|
playground:sputter [2009/04/15 15:56] 132.235.40.97 |
playground:sputter [2010/07/30 10:00] 132.235.40.102 |
||
|---|---|---|---|
| Line 17: | Line 17: | ||
| - Ensure that desired beam target is loaded. | - Ensure that desired beam target is loaded. | ||
| - Set buncher tubes to correct configuration for desired beam species. | - Set buncher tubes to correct configuration for desired beam species. | ||
| - | - Check vacuum on LE extension.� | + | - Check vacuum on LE extension, temperature gauge on cryopump should be at minimum value. |
| - | - Temperature gauge on cryopump should be well below the green mark. | + | |
| - Open source gate valve by pressing either button on gate valve control at source gate. | - Open source gate valve by pressing either button on gate valve control at source gate. | ||
| - | - Remove grounding hook from power supply platform and hang on gate before closing.� | + | - Remove grounding hook from power supply platform and hang on gate before closing. |
| - Close gate to source area. Orange lights on Glassman supplies should come on at gate closing. (If not, check other gate on the other side of the accelerator; both must be secured.) | - Close gate to source area. Orange lights on Glassman supplies should come on at gate closing. (If not, check other gate on the other side of the accelerator; both must be secured.) | ||
| - Use long plexi rod to turn on top 2 Glassmans (target and extractor) by pushing green buttons. | - Use long plexi rod to turn on top 2 Glassmans (target and extractor) by pushing green buttons. | ||
| Line 27: | Line 26: | ||
| - Turn on and set the Del main extractor supply to the desired voltage for the particular buncher setting. | - Turn on and set the Del main extractor supply to the desired voltage for the particular buncher setting. | ||
| + | - Slowly turn up the ionizer heater. The ionizer operates at 21 amperes. It should take about 2 minutes to reach 21 A from the standby value of 10 A. Keep in mind that the amperage will fall slightly as the ionizer gets warmer. Keep adjusting the current until the ionizer is stable at 21 A. | ||
| + | - Turn up the Cs feed tube heater to 0.450 amperes. | ||
| + | - Set the cesium reservoir heater to 0.380. This should be enough to give ones of microamps beam for p and d. A setting of about 0.400 - 0.420 should produce tens of microamps. Cs vaporization starts at a temperature of ~80° Celsius. The maximum reservoir temperature should not exceed 100° Celsius. The reservoir current should not exceed 0.500 | ||
| - Set the Glassman extractor power supply to 12.5 KV. Check to be sure the current is less than about 5 milliamps and the "control milliampres" light is NOT lit. High current indicates that the source needs serviced. | - Set the Glassman extractor power supply to 12.5 KV. Check to be sure the current is less than about 5 milliamps and the "control milliampres" light is NOT lit. High current indicates that the source needs serviced. | ||
| - Set the Glassman target power supply to 6.5 kV. Check to be sure the current is less than about 5 milliamps and the "control milliampres" light is NOT lit. High current indicates that the source needs serviced. | - Set the Glassman target power supply to 6.5 kV. Check to be sure the current is less than about 5 milliamps and the "control milliampres" light is NOT lit. High current indicates that the source needs serviced. | ||
| - | - Slowly turn up the ionizer heater((This source has a HELICAL ionizer.)) in small steps. The ionizer operates at 21 amperes. It should take about ten (10) minutes to reach 21 A from the standby value of 10 A. Keep in mind that the amperage will fall slightly as the ionizer gets warmer. Keep adjusting the current until the ionizer is stable at 21 A. | ||
| - | - Turn up the Cs feed tube heater to 0.450 amperes. | ||
| - | - Set the cesium reservoir heater to 0.380.� This should be enough to give ones of microamps beam for p and d. A setting of about 0.420 should produce tens of microamps.� Cs vaporization starts at a temperature of ~80° Celsius. The maximum reservoir temperature should not exceed 100° Celsius.� The reservoir current should not exceed 0.500 | ||
| - Tune the beam with the inflection magnet, source lens (usually about 1.5 kV), lens A, and 2Y steerer. | - Tune the beam with the inflection magnet, source lens (usually about 1.5 kV), lens A, and 2Y steerer. | ||
| - Monitor the target and extractor currents: target current should be around 2.5 milliamps, and no more than 5 mA. | - Monitor the target and extractor currents: target current should be around 2.5 milliamps, and no more than 5 mA. | ||
playground/sputter.txt · Last modified: 2023/08/22 07:50 by carter
Page Tools
Except where otherwise noted, content on this wiki is licensed under the following license: CC Attribution-Noncommercial-Share Alike 3.0 Unported
