1. UCB Bialkali Cathode Process Program
Small window cathode development, 1.22” samples
Process samples to optimize QE and bandpass
Na2KSb cathodes
Cathode test run #6
Testing B33, B33+ITO, B33+MgO/ITO substrates
Four sample holder
2ea in process chamber
1 B33
2 B33+ITO
1 B33+ITO+MgO
in each

2. Cathode test run #6A, Na2KSb cathode, SbPt
B33, B33+ITO, B33+MgO/ITO substrates
Substrates with ITO are very bad

3. Cathode test run #6B, Na2KSb cathode, Sb
B33, B33+ITO, B33+MgO/ITO substrates
Substrates with ITO are very bad

4. Cathode test run #6B, Na2KSb cathode
B33+ITO+MgO
substrate, 1” aperture, 395nm light, QE uniformity
599
595
597
591
592

5. Cathode test run #6B, Na2KSb cathode
845
B33 substrate, 1” aperture, 395nm light, QE uniformity
839
842
848
822