Future LP works

1. Future LP works 2009/09/02 Manabu Togawa

2. Future LP work • RUN9 analysis (200 & 500 GeV) • Offline analysis & scaler analysis • For future run • Operation • ZDC/SMD operation • Upgrade of scaler mode • Independent operation w/o PHENIX DAQ • SMD scaler : Add • Charge veto info. • ZDC energy info. • BBC hit info. • Make BBC scaler ?

3. RUN9 analysis • We could use scaler data and offline analysis data which are produced by production. • Outputs are LR and UD asymmetries. Many thanks for Ruizhe to implement LP analyzer on production. • Details aredescribed in https://www.phenix.bnl.gov/WWW/p/draft/togawa/run9/localpol_run9_operation.pdf (pptx)

4. Future : upgrade for SMD scaler • Independent operation • Currently ZDC (any?) LL1 needs BB GTM start; SMD scaler needs to BB GTM start. • It could be independent (GL1 GTM always running) • Add charge veto and/or ZDC energy information. • Need to consider small AN at beginning of fill. • While very stable at √ s = 200 GeV data. Fill#10325 Fill#10364

5. Possible thought of small AN Need to monitor • Beam orbits • Colliding with finite crossing angle • Double collision • Check rate dependent (using BBC) • Background • Check rate dependent (using BG counters) Need to reduce Charge ADC, TDC Add : Could reduce BG Detector (ZDC,SMD) FEM DAQ BBC Trigger SMD: Make hit map according to the energy deposit above 20 MIP ZDCinfo. LL1 FPGA CV via fiber SMDinfo.

6. Correlation with BG counters Inserted “blue V0” collimator Inserted any collimator ? Fill#10300 Unknown increase Unknown increase Need to reduce

7. Fill#10450 (3/28 21:40 – 3/29 5:50) Yellow LR asymmetry Need to monitor Residual transverse components are significantly changed during this fill. CNI measurements were : 3/28 20:53 37.4±3.0 % 3/29 00:01 37.6±1.9 % 3/29 03:00 36.4±3.0 % Change at here significantly 10×10-4  12×10-4 Yellow UD asymmetry Waldo’s comment : Automatic orbit correction was not working in fill 10450. • The horiz orb showed a two clear states, but vert drifted. Change at here significantly -8×10-4  -4×10-4

8. Will make BBC scaler ? • Luminosity  62 : 200 : 500 = same rate (roughly) • Cross section at BBC  62 : 200 : 500 = 14 : 24 : 30 (mb) • 62& 200 : Analysis note 688 500 : Amaresh’s presentation at W meeting (2009/06/12) • ZDCN|S ratio relative to BBC  62 : 200 : 500 = 24 : 36 : 67 • Total count rate for ZDCN|S  62 : 200 : 500 = 1 : 8 : 48 • Total AN/∆AN 62 : 200 : 500 = 1 : 9 : 42 Typical rate for ZDCN|S relative to BBC AN 62 : 200 : 500 ~ 2 : 6 : 12 (%)

9. Estimation for scaler • Total AN/∆AN 62 : 200 : 500 = 1 : 9 : 42 • 62 GeV 1 s / point (5 mins)  3 s / 45 mins. • In addition, BG from charged particles are very high. • From pythia simulation, only 14% is neutron while ~25-33% for 200 and 500 GeV (with 5 GeV threshold). * Need to consider polarization, rate. 500 GeV : ~50 s / point (5 mins.) 200 GeV : ~10 s / point (5 mins.)

10. Charged particles AN at PHENIX BBC in √ s = 200 GeV • Analysis done by Kazuya : https://www.phenix.bnl.gov/WWW/p/draft/aoki/meetings/run6/aoki-bbcLP-20060612.ppt • It will achieved 5 s measurement / hour  will be cross check BLUE FORWARD Fit func: p0 x cos( x – p1) YELLOW FORWARD Divided by pol. (pol ~50%) 1-LR 2-LR 3-LR 4-LR

11. Possibilities • Use BB FEM out • BB FEM has TDC1 out put in front • Some of them now are used for BBC-MPC coin. Scaler. • Just put all out to scaler • Via logic unit?? • Same as SMD scaler • Hit information is sent via fiber to LL1. • Scaler will make on BBC LL1 board same as SMD board • Current BB LL1 is not re-programable. • New BB board for multi. collision logic has possibility ?? • No decision to make new one so far…

12. Thank you so much! • Have a good LP !!!

13. backup

14. BBC PMTs Right Left

15. BBC PMTs 3 4 2-L 1-R 1-L Exclusive asym (1-L) && !(1-R) VS !(1-L) && (1-R) 2-R

16. Used fills(runs)