Difference between revisions of "GTS meeting 10 09 17"

Latest revision as of 10:04, 9 October 2017

Measure lifetime for: 0 A, 50 A, 100 A, 150 A, 200 A, 300 A, 400 A (Gun HV=300 kV, I=3.0 mA) - Done - [1]
Measure lifetime with a larger laser size (~rms=0.5 mm)
Lifetime vs biased anode
Slit-Viewer emittance measurement: Slit1 and Viewer3 with focus lens

What is meant to measure emittance, by Cristhian Valerio, Universidad de Sinaloa, Mexico:

Media:PastedGraphic-2.tiff
Media:PastedGraphic-3.tiff
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But if the laser spot is off center, we are limited to measure the "system" emittance, rather than the intrinsic emittance, which would require the laser spot at the center of the cathode.Media:PastedGraphic-1.pdf

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-* High current runs
+* Remaining tasks before shutdown:
+# Measure lifetime for: 0 A, 50 A, 100 A, 150 A, 200 A, 300 A, 400 A (Gun HV=300 kV, I=3.0 mA) - '''''Done''''' - [https://logbooks/entry/3487283]
+# Measure lifetime with a larger laser size (~rms=0.5 mm)
+# Lifetime vs biased anode
+# Slit-Viewer emittance measurement: Slit1 and Viewer3 with focus lens
-* Why is photocathode lifetime limited (100 - 300 C)?
-# Laser heating and QE decay
-# Laser size too small?
+* What is meant to measure emittance, by Cristhian Valerio, Universidad de Sinaloa, Mexico:
-* Remaining tasks before shutdown on Wednesday Oct. 4, 2017:
+#[[Media:PastedGraphic-2.tiff]]
-# Measure lifetime with a larger laser size (~rms=0.5 mm)
+#[[Media:PastedGraphic-3.tiff]]
-# Measure lifetime for: 0 A, 50 A, 100 A, 150 A, 200 A, 300 A, 400 A (Gun HV=300 kV, I=3.0 mA)
+#[[Media:PastedGraphic-4.tiff]]
-# Lifetime vs biased anode
+# But if the laser spot is off center, we are limited to measure the "system" emittance, rather than the intrinsic emittance, which would require the laser spot at the center of the cathode.[[Media:PastedGraphic-1.pdf]]