I've analysed data from runs 4 to 12, which were the alpha irradiations of PD1 and PD3 through the foils.
Time, 'target', which PD is being irradiated.

21:02 Ch2A 1
21:30 Ch2B 1
21:49 Ch2C 1
22:09 Ch2D 1
22:30 AuC 1
23:16 2mm 1
23:35 Au         3
24:23 4mm 3

Data are being sorted with sort.f, with the new variables file which has offsets and gains. 
The offsets should be fine, but the gains are based on data taken with the PDs in their
low-gain 'run' configuration. For these data, to be able to resolve energy loss at the scale of 10's keV, 
we needed higher dispersion, so the gains were increased. Hence the gains in the variables file 
cannot be used. We do a new energy calibration here.


Peakfind has been used to find the centroids of all relevant peaks. 
Using 2mm hole data (no energy loss except for deadlayer) I find the calibration of PD1 to be 4.74379 keV/channel. 
Likewise, using 4mm hole data for PD3 I find PD3's energy calibration to be 4.78963 keV/channel.


Energy losses for the three alpha peaks (5155, 5485, 5805 keV) are then:

Foil ch2-A: 

1077.0 keV
1020.4 keV
972.9 keV


Foil ch2-B

1121.6 keV
1060.8 keV
1010.9 keV


Foil ch2-C

1059.6 keV
1005.1 keV
952.2 keV


Foil ch2-D

1162.3 keV
1101.2 keV
1072.6   keV


Foil thin ch2+flash gold

12.3 keV
8.5 keV
10.3 keV


Foil: Thick gold

50.7 keV
50.4 keV
52.4 keV