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playground:sputter [2013/04/18 08:26] jacobs |
playground:sputter [2015/09/02 08:24] jacobs |
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- 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. | ||
- | - Turn up the **ionizer** heater. The ionizer operates at 21 amperes. Keep in mind that the current will fall slightly as the ionizer gets warmer. Keep adjusting the current until the ionizer is stable at 21 A. It should take about 2 minutes to reach 21 A from the standby value of 10 A. | + | - Turn up the **ionizer** heater. The ionizer operates at 21-22 amps. Keep in mind that the current will fall slightly as the ionizer gets warmer. Keep adjusting the current until the ionizer is stable at 21-22 A. It should take about 1 minute to reach 21 A from the standby value of 10 A. |
- Turn up the Cesium **feed tube** heater to 0.450 amperes. | - Turn up the Cesium **feed tube** heater to 0.450 amperes. | ||
- | - Set the cesium **reservoir** heater to 0.260. This should be enough to give ones of microamps beam for p and d. A setting of about 0.265 - 0.275 should produce tens of microamps. The reservoir current should not exceed 0.280. | + | - Set the cesium **reservoir** heater to 0.260. This should be enough to give ones of microamps beam for p and d. A setting of about 0.270 - 0.275 should produce tens of microamps. The reservoir current should not exceed 0.280. |
- 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 milliamperes" light is NOT lit. High current indicates that the source needs to be 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 milliamperes" light is NOT lit. High current indicates that the source needs to be 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 milliamperes" light is NOT lit. High current indicates that the source needs to be serviced. A newly installed pellet may cause instability for the first hour or so, but will become stable. | - 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 milliamperes" light is NOT lit. High current indicates that the source needs to be serviced. A newly installed pellet may cause instability for the first hour or so, but will become stable. |