Hollow Cathode Light Source at MSU Aaron Kingery MSU 2009 REU

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

Multi-Order Grating

Extreme Ultraviolet

Hollow Cathode Lightsource (HCL)

"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

First Tests

Ethanol Test 1: No ethanol 2: Ethanol on top 3: Ethanol on bottom 4: No ethanol

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 Analysis Scan

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