Hollow cathode light source at msu
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Hollow Cathode Light Source at MSU. Aaron Kingery MSU 2009 REU. Multi-Order Solar EUV Spectrograph Sounding rocket payload Takes images and spectrum simultaneously. MOSES. Multi-Order Grating. Extreme Ultraviolet. Hollow Cathode Lightsource (HCL). Hollow Cathode Lightsource (HCL).

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Hollow Cathode Light Source at MSU

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Hollow Cathode Light Source at MSU

Aaron Kingery

MSU 2009 REU


Multi-Order Solar EUV Spectrograph

Sounding rocket payload

Takes images and spectrum simultaneously

MOSES


Multi-Order Grating


Extreme Ultraviolet


Hollow Cathode Lightsource (HCL)


Hollow Cathode Lightsource (HCL)


"The Test"

  • Pump the intermediate chamber and HCL chamber down 

  • Isolate the HCL chamber

  • Record the pressure in the HCL as a function of time


First Tests


Ethanol Test

1: No ethanol

2: Ethanol on top

3: Ethanol on bottom

4: No ethanol


Virtual Leaks


Virtual Leaks


Stabilization Pressure


How Do You Find the Leaks?

Remove things from the system

Check for leaks

If the leak is still present, remove more things.


How Do You Find the Leaks?

Problems:

Can't remove the pressure gauge or valve

Can't rule out anything if the leak persists.


Large Vacuum Chamber

Will be used to test MOSES

Large enough to put the MOSES payload inside

Needs to be clean


Residual Gas AnalysisScan


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


To-Do List

  • Get new photo diode

  • Turn on the HCL

  • Test the HCL using Ne

  • Calibrate and Test MOSES


Conclusions

  • HCL is almost free of leaks

  • We need a new photo diode to test the HCL

  • Overall a very productive summer


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