MD3312: HL-LHC DA Studies Status Joschua Dilly O MC 30.10.2019 MD3312 1
General MD Outline Amplitude Detuning Analysis Vertical Kicks Outlook O MC 30.10.2019 MD3312 2
General MD Outline O MC 30.10.2019 MD3312 3
General MD Parameters Table: Key MD parameters. Objective: Replication of HL-LHC Dynamic Aperture and Amplitude Detuning. MD #: 3312 Operators: Markus Albert, Matteo Solfaroli Camillocci Fill #: 7391 Beam Process: MD → SQUEEZE-6.5TeV-ATS-65cm-60 15cm-2017 V1 ATSFlat@526 [END] Date: 30 . 10 . 2018 Start Time: 12 : 00 End Time: 17 : 30 Optics: R2017aT65 A60 15C15 60A10mL300 Crossing: No crossing Separation: [ 0.3 / 1.4 / 0.3 / -1 ] mm in [ IP1 / IP2 / IP5 / IP8 ] , Plane: [ V / V / H / H ] Offset: No offset O MC 30.10.2019 MD3312 4
Outline • Setup: End-of-Squeeze, flat-optics, 6.5TeV • Coupling Correction • Waist-Shift tests with K-Modulation • Trimming RCTX to replicate HL-LHC b 6 errors • Beam 1: Amplitude Detuning , Beam 2: Dynamic Aperture • Trimming RCOX, RCSSX, RCSX and RCSOX to replicate HL-LHC b 4 , a 3 , b 3 , a 4 errors • Beam 1: Amplitude Detuning, Beam 2: Dynamic Aperture ⇒ Dump because of Beam 2 O MC 30.10.2019 MD3312 5
Preliminary Results (in MD Note) • Influence of Tune Feedback on ATS-optics • Summary of Waist-Correction • Lifetime Analysis during Trims of errors • Some Lifetime Analysis during AD-Kicks • Some Lifetime Analysis during DA-Kicks O MC 30.10.2019 MD3312 6
Amplitude Detuning Analysis O MC 30.10.2019 MD3312 7
Working Points 2. order 5. order Resonance Lines: 3. order 6. order 4. order 7. order 0.34 0.33 AC Dipole (1) (-4, 1) (0.271, 0.325) 0.32 Natural 0.31 (0.283, 0.31) AC Dipole (2) 0.30 Q y (0.275, 0.3) 0.29 0.28 0.27 0.26 0.26 0.28 0.30 0.32 0.34 Q x • One WP close to 6 th order resonance line (-4 , 1) • One WP far away from resonance lines O MC 30.10.2019 MD3312 8
Subsection 1 Vertical Kicks O MC 30.10.2019 MD3312 9
Vertial Kicks - Spectrum BPM.31R4.B1 N(1, 0) N(0, 1) N(0, 2) N(1, 1) N(2, 0) (-4, 1) (1, 0) (0, 1) (0, 2) (1, 1) (2, 0) 10 1 Amplitude in X [a.u] 10 3 10 5 10 7 10 9 0.0 0.1 0.2 0.3 0.4 0.5 Frequency [tune units] BPM.31R4.B1 N(1, 0) N(0, 1) N(0, 2) N(1, 1) N(2, 0) (-4, 1) (1, 0) (0, 1) (0, 2) (1, 1) (2, 0) 10 1 Amplitude in Y [a.u] 10 3 10 5 10 7 10 9 0.0 0.1 0.2 0.3 0.4 0.5 Frequency [tune units] • Problem: Only in 5 out of 14 kicks tune visible • Tried with SVD Cuts down to 4, Old/New Harpy, SUSSIX • Also: Resonance Line not Visible O MC 30.10.2019 MD3312 10
Vertial Kicks - Spectrum BPM.31R4.B1 N(1, 0) N(0, 1) N(0, 2) N(1, 1) N(2, 0) (-4, 1) (1, 0) (0, 1) (0, 2) (1, 1) (2, 0) 10 1 Amplitude in X [a.u] 10 3 10 5 10 7 10 9 0.0 0.1 0.2 0.3 0.4 0.5 Frequency [tune units] BPM.31R4.B1 N(1, 0) N(0, 1) N(0, 2) N(1, 1) N(2, 0) (-4, 1) (1, 0) (0, 1) (0, 2) (1, 1) (2, 0) 10 1 Amplitude in Y [a.u] 10 3 10 5 10 7 10 9 0.0 0.1 0.2 0.3 0.4 0.5 Frequency [tune units] • Problem: Only in 5 out of 14 kicks tune visible • Tried with SVD Cuts down to 4, Old/New Harpy, SUSSIX • Also: Resonance Line not Visible O MC 30.10.2019 MD3312 10
Vertical Kicks - Amplitude Detuning (700 ± 500) 10 3 m 1 B1 Vkicks 4 3 ] [10 2 Q y 0 0.000 0.001 0.002 0.003 0.004 2 J y [ m ] ⇒ Very high but maybe wrong Amplitude Detuning analysis • To be checked: Maybe error in code with units as new Harpy O MC 30.10.2019 MD3312 11
Vertical Kicks - Intensity Losses Intensity Kicks Losses Date: 2018-10-30 -0.1±0.1 % -0.1±0.0 % -0.2±0.1 % -0.3±0.1 % -0.3±0.1 % 100 -0.4±0.1 % 98 -0.6±0.0 % -0.8±0.0 % -1.3±0.1 % Beam Intensity [%] 96 -2.0±0.1 % 94 -2.5±0.1 % 92 -1.2±0.0 % 90 -0.6±0.1 % -0.4±0.0 % 88 14:10:00 14:15:00 14:20:00 Time • Losses at kicks clearly visible O MC 30.10.2019 MD3312 12
Vertical Kicks - Forced DA Fit: DA= 3.357 ± 0.011 N Kicks 2.5 2.0 Beam Losses [%] 1.5 1.0 0.5 0.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 N = 2 J Y / nominal ⇒ Forced DA evaluation possible from � ∆ I � DA J = J forced − ǫ ln (1) I 0 ⇒ Very small? O MC 30.10.2019 MD3312 13
Outlook O MC 30.10.2019 MD3312 14
To do • Check old AD analysis with new code (to exclude errors) • Check MD3312 data again with SUSSIX • Analyse Horizontal Kicks with b 6 • Analyse RDTs during DA kicks • What else to do with Beam 2 Dynamic Aperture Kicks? • Forced DA for 2D kicks ?? • Analyse Vertical Kicks after full HL-errors O MC 30.10.2019 MD3312 15
O MC 30.10.2019 MD3312 16
Recommend
More recommend
