TBT Data & Lattice Measurement for Recycler Ming-Jen Yang December 17, 2014.

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Presentation transcript:

TBT Data & Lattice Measurement for Recycler Ming-Jen Yang December 17, 2014

TBT study setup Injection –Use R:HT850 and R:VT849 to offset injection –RR $E1 on state 3. Beam –8 Booster turns. –50 bunches. Recycler –Damper OFF. –Separate tune to reduce coupling. Emulate lattice error with –QT301, 302, 303, & 304 at -3 amps. December 17, 2014

Turn-By-Turn Analysis December 17, 2014

Tune setting December 17, 2014

BPM position by lattice, horizontal plane December 17, 2014

BPM position by lattice, vertical plane December 17, 2014

RMS position error, horizontal plane December 17, 2014

RMS position error, vertical plane December 17, 2014

Ring wide beta, horizontal December 17, 2014

Ring wide beta, vertical December 17, 2014

Calibration Factor From Measured beta function December 17, 2014

Lattice examples December 17, 2014

Sine fit to TBT horizontal BPM data December 17, 2014

Sine fit to TBT vertical BPM data December 17, 2014

Horizontal calibration December 17, 2014

Vertical BPM calibration December 17, 2014

Summarize BPM scale factor results Average BPM scale factor –1.01 in horizontal plane. –0.99 in vertical plane. Round BPM, scaled as elliptical –VP607, scale factor 2.18 –HP608, scale factor 1.24 Wide aperture –HP102 scale factor BPM at Lambertson locations –HP232, scale factor –HP402, scale factor –HP522, scale factor December 17, 2014

R90 calculation Matching measured beta December 17, 2014

Matching measured beta function Horizontal planeVertical plane

Focusing tweaks December 17, 2014 Horizontal focus Vertical focus Others

Single quad error test with Measured base lattice December 17, 2014

R90, QT301 at -3 amp Horizontal planeVertical plane

December 17, 2014 R90, QT302 at -3 amp Horizontal planeVertical plane

December 17, 2014 R90, QT303 at -3 amp Horizontal planeVertical plane

December 17, 2014 R90, QT304 at -3 amp Horizontal planeVertical plane

Compare Turn-By-Turn Orbits with R90 calculation using fitted initial position & Angle December 17, 2014

Apply calibration factors, horizontal plane December 17, 2014

Apply calibration factors, vertical plane December 17, 2014

R90 analysis, tbt orbit deviation

Comments on RR Lattice result No inconsistency in the TBT data Beta waves in both planes –Horizontal plane: ~35% in Δβ/β. –Vertical plane:~25% –Matched by R90 to ~5% level. Compare TBT orbit with R90 calculation –Initial positions & angles fitted by TBT analysis. –Good match with matched base lattice. –Not perfect As judged by BPM resolution. Calibration factors –Measured beta functions are credible. Injection test with IPM. December 17, 2014