apex report - c-ad.bnl.gov · apex report: january 15-16, 2008 fulvia pilat time meeting, january...
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APEX Report:January 15-16, 2008
Fulvia Pilat
Time Meeting, January 22, 2008
APEX Schedule January 15-16 2008
06-318-27ORMCorrections.OpticsSatogataBai
08-14Collimationon the ramp DreesR-Demolaize
08-17IPKnobsPtitsynMalitsky08-24
Au77Trbojevic+team
08-29Profile with polarimeterHuang, Sivertz, +team
08-28Hybrid TuneTrackerCameron+team
08-25ChromJump @injMontag
08-03Longitudinal matching@transitionAbreuBaiBlaskiewicz
Injection Ramps Store6-12 bunches
StoreBBQ
InjectionBBQ
Ramps
8pm 10pm 12am 2am 4am 6am 8am
7:00 amInjectorsOFF
9%13.4πmm-mrad
• Deuteron beam profiles (h & v) were taken with one bunch.• Target scan was done and eight of them were found..• No chance to compare with IPM (Booster RF problem, delayed schedule).• Ask for one hour next time:
• Take one bunch measurement to confirm the timing adjustment• 12-20 bunches to compare with IPM• Change RF freq. (+-) and measure profile again to get Dx
HuangSivertzZelenski+team
Horizontal Beam Profile (1)
BBQ hybrid/245MHz
H
V
Comparison of 3D AFE Signals from 1m BBQ Comparison of 3D AFE Signals from 1m BBQ stripline and resonant 245MHz pickupstripline and resonant 245MHz pickup
no deliberate beam excitation
Cameron + team
no deliberate beam excitation
Zoom on Betatron Line of Previous SlideZoom on Betatron Line of Previous Slide
BBQ hybrid/245MHz
H
V
Ready to test on the ramp
Trbojevic + team
Collisions of the Helium like Gold ions Au+77 with CH4Two photon decayExperimental set-up
3.1 3.33.2
Titanium sublimationpumps at 8 o’clock
beam-gas interaction
Collisions of the Helium like Gold ions Au+77 with CH4
Two photon decayExperimental set-up3.1 3.33.2
DreesRobert-Demolaize
Collimation on the ramp
bring the collimator jaws towards the beam after transition to scrape awaythe halo particles
try different set of positions depending on beam decay signal
Comparing beam decay with nominal ramp
last physics ramp
1st APEX ramp
2nd APEX ramp
RF matching at transition - yellowAbreuBaiBlaskiewicz
Longitudinal DamperLongitudinal emittance -> 36% smaller (max) and on average 10%.
Longitudinal DamperStep in the voltage
MalitskyPtitsynBai
IR8 knob:
∆αy = -0.3α(0) = s*/β*
AC Dipole Measurements for IR8 knob IR8 knob:∆αy = -0.3
• Yellow beta* and waist at IP8 before the knob• V beta*: [email protected]
• Yellow beta* and waist at IP8 after the knob• V beta*: [email protected]
• working point was also changed:• before: Qx=0.2297, Qy=0.2336• after: Qx=0.2312, Qy=0.2278
APEX Schedule January 23 2008
Ramps
08-14Coll.on therampDreesRobert-D
Back2 physics
Injection
08-29Profile with polarimeterHuang, Sivertz Zelenski, et al
08-28Hybrid TuneTrackerCameron+team
08-34Beta BeatCalaga
08-27GradienterrorsBai
InjectionAC dipole
08-25ChromJumpMontag
08-24Au77Trbojevic+team
InjectionBBQ
08-31TransitionInstabilitymodesPtitsyn+team
06-318-27ORMCorrect.OpticsSatogataBai
StoreRamps
Ramps StoreBBQ(both)
08-06NonlinearChrommeasureLuo08-17IR nonlinmeasurePilat
Prep impedancemeasureCalaga
5am 6am 8am 9am 11am 1pm 3pm 5pm