VPT photo-cathode uniformity measurements


Visual inspection - photocathode statistics, B Kennedy xls

Note: visual inspection for missing photo-cathode regions needs natural light

6.9.2002 results from Split

11.6.2002 1648 & 1973 handed to Nikola Godinovic at CERN for measurements at Split.
Comments on data from Nikola Godinovic htm

VPT RIE number 1648, barcode #728

RAL visual inspection comment: bad, significant visual non-uniformity at 40% level (11.6.2002)
Scan ps pdf    reverse scan ps pdf    stability ps pdf
Data .txt files: scans l_up  l_dw    stability l_up  l_dw
Current location of tube: Split, as of 9.12.2002

VPT RIE number 1973, barcode #864
RAL visual inspection comment: bad, significant visual non-uniformity at 25% level (11.6.2002)
Scan ps pdf    reverse scan ps pdf
Data .txt files: scans l_up  l_dw  reverse scans l_up l_dw
Current location of tube: Split, as of 9.12.2002


13
.7.2001 results from Split

VPT barcode # 137
RAL visual inspection comment: good uniformity (27.4.2001)
Scan ps pdf jpg hbook
Current location of tube: CERN RAL office, as of 9.12.2002

VPT barcode # 354
RAL visual inspection comment: bad, 20% crescent of missing photo-cathode (27.4.2001)
Scan ps pdf jpg hbook
Current location of tube: CERN RAL office, as of 9.12.2002