The STAR experiment

  --- Agenda April 5, 2016 ---

 

1) Study of Minuit Vertex Finder parameters in Run-14 Au+Au [Xin Dong]

  See Xin's blog: https://drupal.star.bnl.gov/STAR/blog/dongx/minuit-vf-parameter-study-run14-auau200-vpdmb-data

2) Test Production QA

 updates on status of test analyses taking place in PWGs
see e.g. http://www.star.bnl.gov/HyperNews-star/protected/get/starpwgc/4156/1/1/1.html

3) Review PWG_TASKS leases
https://drupal.star.bnl.gov/STAR/pwg/common/pwg-disk-quota-leases

  

4) Upcoming deadlines and conferences

 https://drupal.star.bnl.gov/STAR/pwg/common/upcoming-conferences-deadlines

 

 SQM abstracts: see https://drupal.star.bnl.gov/STAR/blog/geurts/star-2016-conference-contributions

 

5) AOB
 

 

Click on the following link for the  BlueJeans Connection Details for PWGC  Meetings 

 

 
Agenda: 

discussion of materials at hands 

default table of options: 
24 cryo-weeks, 19 cryo-weeks (baseline) and 15 cryo-weeks 

likely 2 weeks of CeC R&D for EIC (coherent electron cooling test) 
2.5 weeks of cool-down and machine commissioning 
from past experience and what CAD provided for switching to d+Au (0.5 weeks per switch) 

1) pp510 
    at least 10--11 weeks of operation  

2) isobars (Zr-96 and Ru-96) 

    Latest news from CAD is that Ru-96 with natural abundance 
    can achieve about 20% of the Au+Au luminosity, (10^9 ions per bunch) 
    This means that Au+Au luminosity is about 103x10^26cm^2s-1, x20%*5barns = 10KHz 
    average store luminosity is about 80% of that. 
    However, this is more than enough for our purpose. 

    If DAQ rate is 2000Hz, and we run at 95 hours per week, 
    this should provides us with 680 million events per week 

    1.5 weeks of Zr and Ru each with ~1 billion MB events (realistically 800M). 
    +0.5 weeks each for setup; 
     4 weeks of Isobar running 

3) possible 27GeV running for Lambda/lambdabar polarization 
    similar calculations, now luminosity goes down by a factor (27/200)^2 = 2% 
    This is 1800Hz 
    with a week running, 600million MB events 
    effectively, at least 1.5 weeks of running 

4) RHICf 
    two programs:  
    a) cross-section 
    b) A_N 
    each about 0.5 week 
    This is a separate request to PAC, but need to coordinate among RHICf and STAR 
    Sako is in our committee so that he knows what we are proposing. 


Cryo-weeks necessary for operation: 

MAXIMUM: 
    2.5+11+4+1.5+1.5 = 20.5 weeks + 2 (CeC) = 22.5 weeks 
    
MINIMUM: 
   a) 
    2.5+10 =12.5+2 = 14.5 weeks (just pp510 program) 
   b) 
    2.5+10+1=13.5+2=15.5 weeks (pp510 + RHICf) 
   c) 
    2.5+10+1+1.5 = 15+2 = 17 weeks (pp510+RHICf+27) 
   d) 
    2.5+10+1+4 = 17.5+2 = 19.5 weeks (pp510+RHICf+Isobar) 
   ???