10 March 2008

RHIC Running:  There was work done to locate the Blue and Yellow beams at the JET so that the polarization of both beams could be measured at the same time.  This was accomplished on Saturday, with Blue at (0, -1)mm and Yellow at (0, -7)mm.  

Chromaticity adjustment for the ramp in Yellow.  This did not make the polarization either better or worse. 

Fill 10000 had intensities of 1.7 and 1.3e11 giving 9kHz at PHENIX ZDC.  Polarization was 53/51 (injection) dropping to 48/44 (Store)in Blue/Yellow.  The beam separation at the JET was decreased from 6 to 5.5mm.  The end of fill 10000 was devoted to a vernier scan for PHENIX. 

Most of last night was spent trying to get injection working in Yellow.  Five or six stores were lost for a variety of reasons: the permit was pulled by the NMC at PP2PP, the permit got pulled by the Snake, and the RHIC RF power supply BS2 tripped off.  In order to get a store in for PP2PP testing we had to disable the NMC interlock, leave the RF Station BS2 off, and fill RHIC with only 1e11 in both rings. 

PHENIX has turned their magnets off.  STAR will leave their magnets on.

PHENIX requires an access at the end of polarized proton running.  STAR also requires a 30 minute access.  Paul Sampson has requested that the two experimental accesses be scheduled sequentially to minimize the number of gate watch personnel needed. 

Todd will work to establish root(S)=9 GeV Au beam in both Blue and Yellow.  Set-up using beam energies of 4.592, 2.6 and 2.5 GeV per beam total energy.  This requires flipping to polarity of the sextupoles, expected to take ~3 hours beginning at 8:00AM.  Au beam has been delivered through the Booster already.  They are running in PPM so that NSRL can run simultaneously. 

Anatoli has requested 24 hours of continued polarized proton development work in the LINAC to help understand the source polarization.  This impacts the duty factor for BLIP, reducing the beam delivered to BLIP by ~15%.

NSRL is running Carbon at 209 and 1000 MeV/n today, in PPM with Au.