Research Plan at RIKEN CC-J 　
				          Date: 19/ 9/2007   (DD/MM/YY)

To: the Planning and Coordination Office of RIKEN CC-J

Reseach Subject : Forward Muon Trigger Upgrade

(PHENIX official or not :      official )


Person responsible for this reserch:
Name : Yoshinori Fukao
Tel/Fax : 3262 / 3270
E-mail : fukao@riken.jp


Person responsible for the job submission:
Name : Yoshinori Fukao
Tel/Fax : 3262 / 3270
E-mail : fukao@riken.jp


Other collabrators in this research subject:
Name : Kohei Shoji
tel/Fax: 3262 / 3270
E-mai: shoji@scphys.kyoto-u.ac.jp

Name : Ken'ichi Karatsu
tel/Fax: 3262 / 3270
E-mai: karatsu@scphys.kyoto-u.ac.jp


Summary of this research (10-100 lines)

This research is to develop new trigger for the PHENIX experiment.
The trigger is for detecting high momentum muon from W boson decay
using forward muon arm of the PHENIX detector. Measurement of
helicity dependent asymmetry in W production at polarized proton-proton
collisions is the strong approach to understand the spin structure of
the proton. Especially, it reveals polarized sea quark distribution of
the proton, which is one of the major questions in the study of
the proton structure. We are developing an additional electrical circuit
to the original electronics. The trigger circuit obtain a part of
the signal from the original electronics and provide the trigger for
the data taking. We produced the prototype of the trigger circuit and
performed the test experiment at PHENIX in this summer to study
the performance of the circuit and the effect to the original
electronics. The data was taking using PHENIX DAQ and will be sent
to CCJ for the analysis. We will produce data summary (DST) table from
the raw data and the DST will be kept on the disk. In addition,
we will utilize CPU of CCJ for further analysis.


Estimated CPU time required : 6000 hours (with Pentium III 1GHz)


Estimated disk space usage required :   500GB


Estimated HPSS space usage required : 3 TB

HPSS band width for above estimate  :    10 MB/s


Target date for completion (cpu) : 31/  3/ 2008  (DD/MM/YY)
                           (disk): 31/  3/ 2008


Plan for the publication of this result (if possible)
No plan currently.

Other useful infomation
No information currently.