Au-Au Run 7  Machine Set Up Plan

(last updated on 02/14/07)
set up plan always in progress ... stay tuned!



Pre - Start Up  (before any ring is at operating temperatures)

 
task
 goal
 who?
 time/
status
setup and check power supplies

 check all power supplies, controls, readbacks etc.
 George et al.
Steve, Al
RF conditioning
 operating voltages for all cavities
 John Butler,
Alex Zaltsman, et al.
Abort kicker thyratrons
 test abort system, evaluate kicker stability (misfires?)
 Jianlin Mi et al.

AGS extraction, AtR tuning
 prepare injection into RHIC, tune AtR up to W-dump
- depends on RS loto
- automated emittance measurements
 Nick, Woody, operations


    Cool-Down Mode (~10 days, only evening and night shifs, Feb. 19- Feb. 24, interrupted by cryo problems
    continue Mar 9)

task
 goal
 who?
 time
 status
Synchro
 AGS to RHIC synchro, set target frequency
 RF group
done
AGS extraction,
AtR tuning
 prepare injection into RHIC
through X- and Y-arcs
 Nick Tsoupas,
RHIC operations
done
Blue initial
injection,
coasting beam
 when blue magnets are ready (w or w/o hysteresis) try to inject,
check for obstacles, establish 1st turn and coasting beam
- injection with kicker off (bo6-tv9 and yo5-tv9 to 1.3 mrad)
- injection with kicker timing adjustment
- minimize injection losses, goal: > 90%
- improve/optimize beam lifetime, prepare for RF work
 all,
RHIC operations,
Wolfram
 2 evening &
night shifts
 done
RF work
 capture
establish optimal voltage
 RF group
 evening &
night shifts
1/2 shift

 done
RHIC blue magnet
setup
 check-out cold magnets, train DX magnets, establish hysteresis to
gamma 107.4, confirm ramp and quench protection software,
exercise ramps
 George et al.
Steve,
Al
 day shifts
5 days
(parallel)
 done (some may
 need to be
repeated after
partial warm-up)
Instrumentation
 begin Instrumentation setup (see Start Up Mode)
- rev tick needed, BPM timing (Rob, Todd)
- tunemeter (Rob, Angelika)
- others (BBQ, ...)
 Rob,
Todd,
++
 evening &
night shifts
1 1/2 shifts
 done
Sextupole polarity check
 circulating (bunched) beam at injection (requires BBQ):
- check old sextupole configuration
- check magnet polarity
 Todd, Yun
 1/2 shift
 done?
RHIC yellow magnet
setup, magnet ramps
 see blue magnet setup
test ramps, hysteresis ramps
 George et al.
Steve
Al
 day shifts
5 days
(parallel)
 -- pending --
Non-linear chromaticity
(could bump into next mode,
depends on magnets)
 blue ring with beam at store
- check again that old configuration & correction works
- check new scheme out with beam
Yun, Nikolay, Steve, Todd
 at least 1 shift
ORM @injection
 - requires timed in BPMs
- can be done with blue only before yellow is cold
(good if we can't ramp yet)
 Todd
 1/2 shift
transverse injection matching
 parallel or semi-parasitic,
- can be done with just blue only
 Todd
 1/2 shift
IPM channel calibration
Roger
 1/2 shift
beam based alignment
 take data, analyze offline, determine offsets
 Jennifer, Todd
 1/2 shift

  


Start Up Mode (10 days, 3 shifts per day, evtl. 2 shifts per day, nights for experiments, begins when both rings are cold,

Mar 15 - Mar 25)

    - once store development starts experimental magnets should be ON

task
 goal
 who?
 time
 status
yellow injection
 establish injection, circulating beam, bunched beam, lifetime
 all
 1/2 shift
Instrumentation Setup
- BPMs
- Tunemeter (Artus)
- Injection Damper
- Schottky (LF & HF)
- BBQ, BTF
- IPM
- WCM
- ?
Timing, polarity, offsets
timing (tunes < 0.5)
timing
 all:
Todd
Rob, Angelika
Rob, Angelika
Kevin B
Pete C. et al.
Roger C
Roger L


done for blue
Machine Tuning
- orbit correction
- bend trim/orbit radius
- decoupling
- chromaticity
- optics measurements

Vadim

Yun
Steve T.
Mei, Todd
done for blue
BBQ feedback development
Pete C., Carl S.,
Al et al.
 6 shifts
 in progress
Ramp development
intensity < 0.2 109/bunch, 6 bunches
corrector settings from Run4
 - try to use old corrector settings for injection
and early ramp (up to beta = 3m), then propagate
 all
 6 days
radial loops



try BBQ tune & coupling feedback
Pete, Carl, Al, Yun

orbit corrections along the ramp < 1 mm Vadim

transition crossing timing, chromaticity jump, octupoles? Christoph

transition monitor commission scope & software
- scope should deliver data for 100-200 revolutions
around transition into SDDSVIEW (get help to write
code for handling SDDSformat early)
 Mike B., Angelika,
Roger L

decoupling along the ramp - use IR skew settings from previous run (run 6, pp)
not Run 4 (IR6 triplet rolls were since corrected mechanically)
 Yun 

chromaticity along the ramp ~ 2-3 units, chromaticity jump Steve T, Christoph

IR orbit separation, longitudinal sep. - BPM offset in triplets? need measurement (w. beam?)
 Vadim

exp. magnets PHENIX & STAR switch on at store,
adjust ramp		 all

Store development
6-56 bunches
increase bunch intensity to > 1 109
establish collisions, DX BPM timing
 all

Todd
 5 days
(total)
Store optics
 orbit correction, decoupling, chromaticity
Dispersion function measurement and correction
IR nonlinear corrections
Betatron tune scans: working point scans
optics measurements (AC dipole)
 Vadim, Yun, Steve T
all
all
Fulvia

all
Mei, Todd

collimation setup
 initial setup
 Angelika
 1/2 shift
gap cleaning setup
 initial setup
 Angelika
 1/2 shift
10 Hz feedback
 evaluate, commission
 Christoph

store 2 store reproducibility
all

rebucketing
 reduce vertex w. storage cavities
 RF group


    Ramp Up Mode (1 week, 1-2 shifts per day, Mar 25-Mar31 )
task
 goal
 who?
 time
 status
ramp development with intense beam
 define optimal operation parameters, observe emittance
- extra attention to bunch2bunch emittance
- monitor emittance of last bunches in train carefully
 all
 7 days
pressure rise
SY, Haixin ..

higher number of bunches ramp development
 gradually increase beam intensity, number of bunches
reduce beam losses
verify longitudinal separation

 all

collimation on the ramp?
Angelika

detector background
 optimize orbits, improve collimator setup
 Angelika, all

optimize gap cleaning
Angelika

optimize beginning of store
Greg


    Physics Running (day shifts if needed, Mar 26 -> Jun 30)