sPHENIX discussion of physics

[Rosi Reed <rjr215 AT lehigh.edu>]

Hi Dave and everyone,

The document looks good, I am just about to jump in a meeting but wanted to send a few comments from the first half of the document.  I generally avoided word-smithing due to the time constraints, but I've pointed out a few minor issues and asked a couple easy-to-answer questions.  I will read the rest in an hour or two.

Regards,

Rosi

7: The document -> This document
8: Maybe cite the pCDR?  I realize that this isn’t this type of document, but if it goes out in the wild it’s possible that it might be read by someone who isn’t intimately familiar with the whole thing.

Table 1: Should we say what the delta is with respect to the MIE?

34: come to -> reach

71: We say HF are critical, but one of our two choices precludes these analyses.  Is this what we want to say?
89: five -> six
134: experts -> expert

172: Do we need to specify here by how much we’ve reduced the EMCal granularity?
177: have to investigated -> have to be investigated

206: perhaps add a statement on jet structure as well, changing from the VTX to the 2-layer MAPS will increase the efficiency and decrease the fake rate within the jet cone.  (Not completely quantified due to the lack of simulation, but looking at the results with respect to ideal 7-layer MAPS, the vtx performance in this regard was rather poor).

On Mon, Jun 6, 2016 at 12:05 AM, Megan Connors <meganEconnors AT gmail.com> wrote:

Sorry if this is a repeat, I don't know if my first attempt will go through.

On Sun, Jun 5, 2016 at 11:55 PM, Megan Connors <mjuszkie AT gmail.com> wrote:

Hi Dave and Gunther,

Thanks for pulling this all together. I wanted to do a careful read through but didn't make it through all the appendices yet. Here are the comments I found tonight.

Best,

-Megan

-In the executive summary, it doesn't really describe what the delta cost savings is in reference to. 

-L87 you list 6 subsystems but in 89 say 5

-L139-141 I'm not sure you want to include this sentence here since you are explaining the reference design and the 2 layers is really a descoped version.

-L152 comma after 0.9

-L170 "effect" to "effect on"

-L173 "The would" to "This would"

-L204 maybe add something like "2 layers instead of 3 layers" to indicate that this is a reduction from the ideal reference design

-Table 1.1 I think the line between the Maps and the vtx reuse can be removed since these are really one decision item. If you remove the line you can remove the "see Maps above"

-Table 1.2 isn't described in the text. I think in Section 1.6 you could add something like "Table 1.2 lists additional options that were considered. However, these options are excluded from table 1.1 due to the significant impact they have on the project schedule, infrastructure and damage to the physics program especially when combined with any other modifications to the calorimetery system."

-L223 "pTDR" to "pCDR"

-L268 "sphenix" to "sPHENIX"

-L296 "Hcal" to "HCal"

(maybe check for other inconsistencies like the 2 above)

On Sun, Jun 5, 2016 at 8:33 PM, David Morrison <dave AT bnl.gov> wrote:

Dear collaborators,

There was a very good discussion of the response to the ALD’s charge at the Friday general meeting, and here is a draft that incorporates some of the advice we received.  For example, there is now a table of scenarios in the executive summary.  There is also an appendix with summary budget numbers.  We’d like to consider this draft provisionally final (we’d turn off the line numbers in the truly final version of course), but we’d be happy for any specific comments by noon ET on Monday.  After the Friday meeting, we had arranged with Berndt Mueller to move the deadline from Friday to Monday.

https://www.dropbox.com/s/qsy19ir6z551ls1/draft_v3.pdf?dl=0

I’m tripping over some technical problems trying to produce a diff between this version and the previous one, but if I manage to overcome those I’ll post a link to a diff too.

Regards,

Dave and Gunther

David Morrison Brookhaven National Laboratory phone: 631-344-5840
Physics Department, Bldg 510 C email: dave AT bnl.gov
Upton, NY 11973-5000

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Rosi Reed

Assistant Professor, Physics Department

Lehigh University
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