sPHENIX HCal discussion

["Lajoie, John G [PHYSA]" <lajoie AT iastate.edu>]

Hi Edward,

    This wasn't for tomorrow, but for next Tuesday's (2/23) HCAL meeting. I have created an agenda and timetable for next week's meeting at:

https://indico.bnl.gov/conferenceDisplay.py?confId=1776

There is a slot for a talk by you, and you should be able to add slides to the indico page (you own the talk).

John

On 2/17/2016 4:20 PM, Edouard Kistenev wrote:

Hi, John, 

I can't put it on agenda - not in the list of managers. Someone needs to do it for me.

Edward

PS. Comment to value engineering from last meeting.

Tapered tiles are already tested - they are in HCal lab and everyone have seen them. With small tiles - it is easy, with long tiles - a bit more sophisticated and time consuming but doable. What is important - tiles with reflective coating are not sensitive at all to minor damage to surface caused by machining (if 50mkm limited) - coating process takes care of it. Even more - machined tile if left untreated will be prone to crazing. Chemical treatment takes care of its longevity.

Flat iron plates are great idea. Unfortunately - they leave no space for scintillator at the inner radius of HOuter (or leave a lot of empty space in the structure) - I thought we gave it up.  

Let’s first finish with our existing prototype, it looks so elegant that any attempts to “improve” it today sound like heresy. After the run we may use “stretching” to take a break and one more look into the whole design.

--

John Lajoie

Professor of Physics

Iowa State University

 

(515) 294-6952

lajoie AT iastate.edu

Contact me: john.lajoie