sPHENIX HCal discussion

[Craig Woody <woody AT bnl.gov>]

Hi John,
   Interesting. I'm a bit surprised at the magnitude of the effects a 
rather low dose. If I'm interpreting their results correctly, they see a 
decrease of ~ 20% for their PS scintillator for a maximum dose of ~ 30 
Krad (Layer 7 in Fig. 3). That's not a very high dose. I'm not sure 
about the position dependence of the integrated doses we reached in 
PHENIX, but I know they were ~ 10's of Krad near the beam pipe. It's 
probably worth have a closer look at those numbers and see what it would 
be in the vicinity of the the Inner and Outer HCAL tiles. Also, we're 
planning to do some radiation damage studies of the injection molded 
acrylic light guides that we plan to use for the EMCAL, so we could also 
test some of the HCAL tiles at this time as well.

Cheers,
Craig

On 7/19/2017 9:23 PM, John Haggerty wrote:
> It's been asked by one of our reviewers, so I was looking at the 
> literature on radiation damage in plastic scintillator.  This paper is 
> interesting and close to our situation in the HCAL:
>
> > https://arxiv.org/abs/1608.07267
>
> One of the authors of this paper is going to be here for the 
> Sambamurti Lecture on Monday, August 7, we could pick his brain.