Hollow%20Cathode%20Light%20Source%20at%20MSU

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Hollow Cathode Light Source at MSU

• Aaron Kingery
• MSU 2009 REU

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MOSES

• Multi-Order Solar EUV Spectrograph
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• Sounding rocket payload
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• Takes images and spectrum simultaneously
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Multi-Order Grating

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Extreme Ultraviolet

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Hollow Cathode Lightsource (HCL)
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Hollow Cathode Lightsource (HCL)
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"The Test"

1. Pump the intermediate chamber and HCL chamber
   down 
2. Isolate the HCL chamber
3. Record the pressure in the HCL as a function of
   time

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First Tests
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Ethanol Test

• 1 No ethanol
• 2 Ethanol on top
• 3 Ethanol on bottom
• 4 No ethanol

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Virtual Leaks

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Virtual Leaks

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Stabilization Pressure

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How Do You Find the Leaks?

• Remove things from the system
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• Check for leaks
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• If the leak is still present, remove more things.
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How Do You Find the Leaks?

• Problems
• Can't remove the pressure gauge or valve
• Can't rule out anything if the leak persists.
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Large Vacuum Chamber

• Will be used to test MOSES
• Large enough to put the MOSES payload inside
• Needs to be clean

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Residual Gas Analysis Scan

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Photo diode

• It was held into possition by the pins
• The electical connections was also made by the
  pins.

Pin broke off We had make a new way to it to be
held and allow it to send a signal Upon testing
it was found to be broken
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To-Do List

• Get new photo diode
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• Turn on the HCL
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• Test the HCL using Ne
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• Calibrate and Test MOSES

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Conclusions

• HCL is almost free of leaks
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• We need a new photo diode to test the HCL
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• Overall a very productive summer
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