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playground:sputter
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playground:sputter [2010/07/30 10:00] 132.235.40.102 |
playground:sputter [2011/04/06 15:01] 132.235.40.233 Add reminder to turn on glassman supply to lens, spelling corrections, etc |
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| ** Startup and Normal Operation (in control room) ** | ** Startup and Normal Operation (in control room) ** | ||
| - | - 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. | + | - 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 current 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. | + | - 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 cesium **reservoir** heater to 0.285. This should be enough to give ones of microamps beam for p and d. A setting of about 0.290 - 0.300 should produce tens of microamps. Cs vaporization starts at a temperature of ~80° Celsius. The maximum reservoir temperature should not exceed 130° Celsius. The reservoir current should not exceed 0.300. |
| - | - 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 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 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 milliamperes" light is NOT lit. High current indicates that the source needs to be serviced. |
| - | - Tune the beam with the inflection magnet, source lens (usually about 1.5 kV), lens A, and 2Y steerer. | + | - Set the Glassman **lens** power supply to 1.5 kV. |
| + | - Tune the beam with the inflection magnet, source lens (usually about 1.5 kV), einzel lens A, and 2Y steerer. The 2X steerer should be near neutral (5.00 on dial) as X steering is be done by the inflection magnet at this stage. | ||
| - 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. | ||
| Line 38: | Line 39: | ||
| - The source gate valve should be closed for this operation. | - The source gate valve should be closed for this operation. | ||
| - Wait for normal vacuum. Normal is when the needle is in the blue mark on the gauge above the TV in the control room. | - Wait for normal vacuum. Normal is when the needle is in the blue mark on the gauge above the TV in the control room. | ||
| - | - Set ionizer to 10A.� This will lead to a rise in the vacuum pressure. | + | - Set ionizer to 10A. This will lead to a rise in the vacuum pressure. |
| - Wait for vacuum to fall back to the blue mark on the gauge | - Wait for vacuum to fall back to the blue mark on the gauge | ||
| - | - Raise the ionizer by an additional� 2-3 A and wait for the vacuum to fall back into the blue range. | + | - Raise the ionizer by an additional 2-3 A and wait for the vacuum to fall back into the blue range. |
| - | - Repeat this process until the ionizer is at 21 A and the vacuum is in the blue range. | + | - Repeat this process until the ionizer is at 21 A and the vacuum is in the blue range, may take 8 hours. |
| - Open the source gate valve and carry out the Startup and Normal Operation. | - Open the source gate valve and carry out the Startup and Normal Operation. | ||
| Line 67: | Line 68: | ||
| Telephone: (740)593-0933\\ | Telephone: (740)593-0933\\ | ||
| E-Mail: massey@ohio.edu\\ | E-Mail: massey@ohio.edu\\ | ||
| - | Last modified on 12/06/2006\\ | + | Last modified on 7/30/2010 DKJ\\ |
playground/sputter.txt · Last modified: 2023/08/22 07:50 by carter
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