Re: eye

[Steven Clayton <smclayto@npl.uiuc.edu>]

Dear Peter,

I already did exactly that.  If I'm not mistaken the cathode is on
ground.  I didn't find the voltages in the Run 6 logbook, but I'll
check again tomorrow.  The base looks like a simple resistor divider
chain, with equal intervals except for the first and last; probably
it's more like the "voltage divider A" referred to in the data sheet,
meaning a maximum supply voltage of 1350 V, 1200 V typical, right?
I have a vague recollection that the voltage was relatively low
compared to that of the eSC PMTs.  Do you know where we might find
a positive HV supply suitable for PMTs (4 of them)?

Thanks,
Steven

On Fri, Oct 28, 2005 at 05:24:36PM -0500, Peter Kammel wrote:
> Dear Steve,
> 
> The best is to open one tube assembly and check whether the anode or
> cathode is on ground (the pinout is in your data sheet). You
> could also check the run 6 logbook, which should still sit in the 
> barrack bookshelves. I'm sure we recorded the HV there.
> 
> Good luck
> 
> Peter