PSB-PS TRANSFER AT 2 GEV - CONCEPTS AND OPTICS W. Bartmann, J. Abelleira et al. ABT LIU Review, 20-Nov-15.

Slides:



Advertisements
Similar presentations
Synchrotron Radiation What is it ? Rate of energy loss Longitudinal damping Transverse damping Quantum fluctuations Wigglers Rende Steerenberg (BE/OP)
Advertisements

ATF2 FB/FF layout Javier Resta Lopez (JAI, Oxford University) for the FONT project group FONT meeting January 11, 2007.
Feed forward orbit corrections for the CLIC RTML R. Apsimon, A. Latina.
The HiLumi LHC Design Study is included in the High Luminosity LHC project and is partly funded by the European Commission within the Framework Programme.
ATF2 Javier Resta Lopez (JAI, Oxford University) for the FONT project group 5th ATF2 project meeting, KEK December 19-21, 2007.
Simulation of direct space charge in Booster by using MAD program Y.Alexahin, N.Kazarinov.
Transfer Line -2 Optics Design For CTF3 Amalendu Sharma, Abdurrahim, A.D.Ghodke, Gurnam Singh and V.C. Sahni Raja Ramanna Centre for Advanced Technology.
Y. Ohnishi / KEK KEKB-LER for ILC Damping Ring Study Simulation of low emittance lattice includes machine errors and optics corrections. Y. Ohnishi / KEK.
1 Status of EMMA Shinji Machida CCLRC/RAL/ASTeC 23 April, ffag/machida_ ppt & pdf.
Feed forward orbit corrections for the CLIC RTML R. Apsimon, A. Latina.
The Overview of the ILC RTML Bunch Compressor Design Sergei Seletskiy LCWS 13 November, 2012.
October 4-5, Electron Lens Beam Physics Overview Yun Luo for RHIC e-lens team October 4-5, 2010 Electron Lens.
Simulation of direct space charge in Booster by using MAD program Y.Alexahin, A.Drozhdin, N.Kazarinov.
CesrTA Experimental Plan M. Palmer for the CesrTA Collaboration November 17, 2008.
“Beam Losses” Christian Carli PSB H - Injection Review, 9 th November 2011 Several topics more or less related to beam losses, a study still somewhat at.
A U.S. Department of Energy Office of Science Laboratory Operated by The University of Chicago Office of Science U.S. Department of Energy Containing a.
The Quadrupole Pick-up in the CPS -intro and progress report PPC 3 Dec 1999 A. Jansson.
Design of the Turnaround Loops for the Drive Beam Decelerators R. Apsimon, J. Esberg CERN, Switzerland.
Chromaticity dependence of the vertical effective impedance in the PS Chromaticity dependence of the vertical effective impedance in the PS S. Persichelli.
28-May-2008Non-linear Beam Dynamics WS1 On Injection Beam Loss at the SPring-8 Storage Ring Masaru TAKAO & J. Schimizu, K. Soutome, and H. Tanaka JASRI.
Update on injection studies of LHC beams from Linac4 V. Forte (BE/ABP-HSC) Acknowledgements: J. Abelleira, C. Bracco, E. Benedetto, S. Hancock, M. Kowalska.
1 EMMA Tracking Studies Shinji Machida ASTeC/CCLRC/RAL 4 January, ffag/machida_ ppt & pdf.
Beam Dynamics WG K. Kubo, N. Solyak, D. Schulte. Presentations –N. Solyak Coupler kick simulations update –N. Solyak CLIC BPM –A. Latina: Update on the.
Design options for emittance measurement systems for the CLIC RTML R Apsimon.
Andreas Jansson, "Quadrupole Pick-ups", LHC BI-Review, November 19-20, Quadrupole Pick-ups  What is a quadrupole pick-up?  PS pick-ups and experimental.
Primary beam production: progress - Extraction from LSS2 - Switching from TT20 at 100 GeV B.Goddard F.Velotti, A.Parfenova, R.Steerenberg, K.Cornelis,
Emittance Tuning Simulations in the ILC Damping Rings James Jones ASTeC, Daresbury Laboratory.
Dave Johnson July 12, 2010 NOvA/ANU Recycler Upgrades Review Optics, Apertures, and Operations Nova-doc 4930.
By Verena Kain CERN BE-OP. In the next three lectures we will have a look at the different components of a synchrotron. Today: Controlling particle trajectories.
The Introduction to CSNS Accelerators Oct. 5, 2010 Sheng Wang AP group, Accelerator Centre,IHEP, CAS.
Dave Johnson July 12, 2010 NOvA/ANU Recycler Upgrades Review Optics, Apertures, and Operations Nova-doc 4930.
PSB H- injection concept J.Borburgh, C.Bracco, C.Carli, B.Goddard, M.Hourican, B.Mikulec, W.Weterings,
ERHIC Orbit Correction Studies (Minor Update) Using Oct’14 lattice and dispersion diagnostic January 5, 2015Stephen Brooks, eRHIC FFAG meeting1.
Some ideas to optimise PSB injection chicane Wim, Brennan, Jan, Masamitsu.
ECR - PSB: New KSW magnet in 16L1 Luis Feliciano, 4 th February.
PSB MD C. Bracco, G.P. Di Giovanni. Outline Aim MD1: – Matching – Trajectories – Transmission MD2 – Matching – Trajectories – Transmission Next steps.
STABILITY STUDIES OF THE PSB-TO-PS TRANSFER W. Bartmann, J. Abelleira With many inputs from: O. Berrig, J. Borburgh, S. Gilardoni, GP di Giovanni, B. Goddard,
Low Emittance Rings 2014 Workshop INFN-LNF, 18. September 2014 Low Emittance Studies at 3 GeV at PETRA III Joachim Keil DESY.
Lecture 4 Longitudinal Dynamics I Professor Emmanuel Tsesmelis Directorate Office, CERN Department of Physics, University of Oxford ACAS School for Accelerator.
Workshop on Accelerator R&D for Ultimate Storage Rings – Oct Nov.1 – Huairou, Beijing, China A compact low emittance lattice with superbends for.
MTE commissioning status S. Gilardoni, BE/ABP With C. Hernalsteens and M. Giovannozzi.
LAGUNA Primary Beam: Extraction and Transfer B.Goddard TE/ABT 23/01/2013 Reporting on behalf of many colleagues 400 GeV – Extraction from SPS – Upgrade.
Layout and Arcs lattice design A. Chancé, B. Dalena, J. Payet, CEA R. Alemany, B. Holzer, D. Schulte CERN.
Threading / LTC/ JW1 How difficult is threading at the LHC ? When MADX meets the control system … J. Wenninger AB-OP &
HP-PS injection and extraction status W. Bartmann, B. Goddard HP-PS meeting, 20-November 2013.
26/11/2015 LIU-PSB meeting, Status of BE and BT kickers and septa 2 Extraction and Recombination Septa and Kickers status Jan Borburgh, M. Atanasov, W.
First evaluation of Dynamic Aperture at injection for FCC-hh
Primary Beam Lines for the Project at CERN
Test of Optical Stochastic Cooling in CESR
Options and Recommendations for TL and Dumps
Test of Optical Stochastic Cooling in CESR
Emittance growth AT PS injection
Large Booster and Collider Ring
Update on the PSB Transfer Lines
PSB-PS instrumentation for LIU
Multiturn extraction for PS2
SCU Next Phase Meeting July 8, 2014.
UPDATE ON DYNAMIC APERTURE SIMULATIONS
CNGS Proton beam line: news since NBI2002 OUTLINE 1. Overview
PS2 Injection/Extraction Layout
Multi-Turn Extraction for PS2 Preliminary considerations
Feed forward orbit corrections for the CLIC RTML
Impact of short dipoles on PSB performance (status)
Negative Momentum Compaction lattice options for PS2
Optics Measurements in the PSB
IR Lattice with Detector Solenoid
Negative Momentum Compaction lattice options for PS2
Specifications for the XFEL Beam Switchyard Kickers
G.H. Wei, V.S. Morozov, Fanglei Lin Y. Nosochkov (SLAC), M-H. Wang
Fanglei Lin JLEIC R&D Meeting, August 4, 2016
Presentation transcript:

PSB-PS TRANSFER AT 2 GEV - CONCEPTS AND OPTICS W. Bartmann, J. Abelleira et al. ABT LIU Review, 20-Nov-15

Aim of the PSB-PS transfer upgrade (as of 2013 review) All beams to be transferred at 1.4 and 2 GeV (until LS2 also 1.0 GeV in BT and BTM/BTY for ISOLDE, no 1.0 GeV after LS2) Magnet strength increased by 30% (Bρ 2GeV /Bρ 1.4GeV ) Can relax PS injection kicker fall time for LHC beam but not for HI beam LHC beam can be injected with existing kicker in short-circuit mode with longer fall time HI beam injection at 2 GeV requires additional kicker in SS53 Match optics at PS injection to reduce emittance blow-up due to dispersion mismatch Horizontal dispersion is presently not matched; install one additional quadrupole in BTP line to match the line to the PS injection optics Vertical dispersion remains mismatched due to the vertical displacement of the four PSB rings (Dy < 0.5 m) Optimise optics for different beams Requires ppm capability of HW (i.e. upgrade of BTP) 20/11/2015ABT LIU review, optics for 2 GeV transfer 2 New kicker specification Changed focus after 2015 review results

Layout BT 20/11/2015ABT LIU review, optics for 2 GeV transfer 3

Layout BTP and BTM 20/11/2015ABT LIU review, optics for 2 GeV transfer 4

Kicker specifications Initially assumed that same performance as of today is required Required additional kicker KFA53 to complement for 2 GeV beams injected in terminated mode Specifications for all kickers from PSB extraction, recombination and PS injection derived from requirements for LIU beams KFA45 can be modified to permanent SC mode and KFA53 be suppressed (see Thomas’ talk) Emittance growth due to different ripple on the waveform was studied for present and future system Last week new KFA45 solution approved by LIU-PS 20/11/2015ABT LIU review, optics for 2 GeV transfer 5

Emittance growth studies All details on kicker system studies will follow from Thomas Tool to estimate relative impact on beam coming from waveform ripple and rise/fall time wrt realistic bunch distributions Should not only focus on rise/fall times and flattop ripple since postpulse ripple is for the present system disturbing the beam most Emittance growth in % Flattop rippleRise/fall edgesPostpulse ripple LIU upgrade field Measured current present system Simulated current LIU upgrade /11/2015ABT LIU review, optics for 2 GeV transfer 6

Layout/optics changes Switching dipole deflection centre can stay  rematch BTP BTM.BHZ10 “fits” with a few mm distance from the wall, to be closely followed up Provided beam envelope for vacuum chamber specs First quad in PS zone eats into the wall  checks with RP ongoing 20/11/2015ABT LIU review, optics for 2 GeV transfer 7

Optics spread in the lines Edge focussing of recombination affects optics functions of each line differently 20/11/2015ABT LIU review, optics for 2 GeV transfer 8

PS injection Detailed integration studies ongoing Definition of Madx survey wrt data from surveyors ongoing 20/11/2015ABT LIU review, optics for 2 GeV transfer 9

Stability calculation Assign correctable errors and verify correction feasibility Only limited by BPM readings and correction strategy  checked in Oct-13, OK Assume machine free of correctable errors and assign separately dynamic errors to identify the main contributors to delivery imprecision Calculate delivery precision of position and angle at PS injection Check aperture in the lines (losses, radiation) Check foreseen margins for CO and betabeat in GFR Calculate emittance growth from steering error Calculate unavoidable emittance growth from optics and dispersion mismatch Sum all error sources into overall emittance growth and potential particle loss for LHC and HI beams 20/11/2015ABT LIU review, optics for 2 GeV transfer 10 R

Emittance growth From steering error at PS injection due to power converter ripple and kicker waveforms R x 2 /ε 0 (random errors ) gives and R x 2 /ε 0 (systematic offset) gives 0 and (extraction kicker waveform not included) From optics mismatch between different lines Energy error, geometrical mismatch and coupling negligible All error sources considered independent 20/11/2015ABT LIU review, optics for 2 GeV transfer 11 ErrorEmittance growth [%] Present situation (LHC) Emittance growth [%] LHC beam Emittance growth [%] HI beam HorVertHorVertHorVert Steering error Betatron mismatch Dispersion mismatch Total

Summary of layout and optics (shown at the review Sept-15) Since last review in Oct-13 Iterations on magnet design, integration and update of the optics model Resulting changes BT.BHZ10 can be kept at its centre of deflection  TL geometry can be kept Previously moved quadrupoles to make space can be kept at the present location Two locations of integration interferences (QNO20 with wall, QN040 with steerer) to be addressed Locations for extra BLMs identified Position for wideband pick-up in upgraded BTP to be checked Envelope for (new) BPMs required to be included in the integration Optics rematched accordingly One quadrupole (BTP.QNO20) due to difference in 4 lines increased GFR, but 25% lower gradient than max  within our margin Specifications for quadrupole gradients, field homogeneity and good field regions as from Oct-13 confirmed Specifications for power converter ripple as of beginning 2015 systematically checked and confirmed Random errors for both planes balanced Comparison of different sources of emittance growth show: Difference in optics between the four lines is the main cause of emittance growth, in particular the dispersion mismatch Emittance growth from steering errors due to power converter ripple is a minor contributor and can in principle be damped Assuming similar systematic contributions from PSB extraction and PS injection kicker in the horizontal plane as for the recombination kickers gives as maximum expected oscillations to be damped: +/- 1.5 mm in both planes The present mismatch situation is improved, but further optimisation required to balance the contributions from betatron and dispersion mismatch and thus reduce the overall emittance growth No additional particle loss due to emittance growth of HI beams 20/11/2015ABT LIU review, optics for 2 GeV transfer 12

Update since review end of September 2015 Further iterations with integrations  spotted issues with aperture model in Madx, being updated BTP optics: matching to reduce spread between lines  close to be finished BTM optics: go for dedicated measurement optics per line, lower prio PS injection: update of MADX survey ongoing Beam stopper: specification for energy deposition studies ongoing Study 160 MeV PSB extraction as preparation of H- inj commissioning Detailed study of trajectories at PS injection with 2 GeV strayfields from main units 20/11/2015ABT LIU review, optics for 2 GeV transfer 13