------------------------------------------------------ Flemming Videbaek Physics Department Brookhaven National Laboratory tlf: 631-344-4106 fax 631-344-1334 e-mail: videbaek@bnl.gov ----- Original Message ----- From: "Yousef Makdisi" <makdisi@bnl.gov> To: "Dana Beavis" <Beavis@bnl.gov>; "Christie William" <Christie@bnl.gov>; "Frawley Anthony" <frawley@fsuhip.physics.fsu.edu>; "Robert Pak" <Robert.Pak@bnl.gov> Cc: "Dejan Trbojevic" <trbojevic@bnl.gov>; "Todd Satogata" <satogat1@bnl.gov>; "Thomas Roser" <roser@bnl.gov>; "Phil Pile" <pile@bnl.gov>; "Derek Lowenstein" <lowenstein@bnl.gov>; "Tom Kirk" <tkirk@bnl.gov>; "Tom Ludlam" <Ludlam1@bnl.gov>; "Nick Samios" <samios@bnl.gov>; "Satoshi Ozaki" <Ozaki@bnl.gov>; "Yousef Makdisi" <makdisi@bnl.gov> Sent: Thursday, June 21, 2001 2:24 PM Subject: Status > To all, > This is to keep you abreast of the progress on RHIC. Please share it > with your constituents as I do not have access to the full distribution > lists: > > Last night, we had two solid shifts during which significant progress > was achieved on the Blue ring. Ten out of possible 12 gamma-t power > supplies and quads were used to accelerate the beam through transition > and to gamma of 70 GeV. The observed beam loss at transition was > approximately 20 percent. It is anticipated that further tuning, the use > of the radial loop, and the addition of sextupole corrections before and > after transition will further reduce the losses. This is planned for > tonight. It is also worth noting that we did not experience any > quench-link events either. > > Progress was also made on the DX training as a current of 6200 amps was > achieved. Work continues on this front today. The operating current at > 100 GeV is 6300 amps. The training goal is 6400 amps. If completed > today, acceleration of beam to 100 GeV will be attempted tonight. > > Work continues on preparing the power supplies of the Yellow ring. The > first stage is to provide the capability to circulate beam at injection. > If completed today, then we will attempt injection into the Yellow ring > tonight. > > The second stage concerns tuning the supplies for ramping as well as > completing the respective gamma-t work. It is expected to continue this > tomorrow. Friday day-time access will be available on an > as-needed-basis. > > Regards, > Yousef >
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