FJPPL-FKPPL Workshop on ATF2 Accelerator R&D

11 Feb 2013, 09:00 → 13 Feb 2013, 13:00 Europe/Zurich

Room 166 in building 200 (Laboratoire de l'Accélérateur Linéaire)

Research on the Accelerator Test Facility 2 at KEK (Japan) is conducted at LAL (Orsay) and LAPP (Annecy) in the context of the FJPPL "Toshiko Yuasa" and FKPPL Associated International Laboratories, in close collaboration with several Asian, European and American partners. This workshop is mainly dedicated to Goal 2 (stabilise the beam spot at the interaction point with a 1-2 nm precision using feedback), especially preparations for new hardware to be installed in spring 2013. Recent activity, progress and short/medium term planning towards Goal 1 (establish and maintain a 37 nm vertical beam size at the interaction point) will also be discussed, as a follow-up of the 15th ATF2 project meeting at KEK, in January 2013, as well as further plans under consideration and study for the future evolution of the project.

Fuzemeeting (Monday) monday.txt

Fuzemeeting (Tuesday) tuesday.txt

Fuzemeeting (Wednesday) wednesday.txt

LAL Meeting Web Page for registration and practi http://events.lal.in2p3.fr/ATF2-2013/index.html

Monday, 11 February

1 Welcome, practical matters, introduction

ATF2 beam size studies and optics investigation and improvement

Convener: Dr Toshiaki Tauchi (KEK)

2 Status of ultra-low beta optics proposal at ATF2 for ILC and CLIC

(remotely)

Speaker: Eduardo MARIN LACOMA (SLAC)

Slides ATF2_4_LAL.pdf

3 New results and analysis of signals from the BSM, including assessment of instrumental systematics

(remotely)

Speaker: Ms Jacqueline Yan (University of Tokyo)

Slides 130211-ATFLAL.pdf

4 Experimental method for diagnosis of residual fringe tilt and xy correlation at IP

Reliability check in the presence of imperfections (presented by P. Bambade)

Speaker: Ms Sha BAI (IHEP)

Slides Orthogonal_waist_correction_in_the_presence_of_IPBSM_and_xy_correlation.pdf Orthogonal_waist_correction_in_the_presence_of_IPBSM_and_xy_correlation.ppt

5 Alternative FFS design emphasizing vertical chromaticity correction

Work presently done for ILC, possible application to ATF2

Speaker: Yi Wei Wang (Institute of High Energy Physics (IHEP)-Academia Sinica-Academia)

Slides RE-OPTIMIZATION_OF_THE_FINAL_FOCUS_SYSTEM_OPTICS_WITH_VERTICAL_CHROMATIC_CORRECTION_(FJPPL-FKPPL_11th_Feb_2013).pdf RE-OPTIMIZATION_OF_THE_FINAL_FOCUS_SYSTEM_OPTICS_WITH_VERTICAL_CHROMATIC_CORRECTION_(FJPPL-FKPPL_11th_Feb_2013).pptx

6 Coffee break

Current goal 1 issues: Progress, review, updates, near / medium / long term plans

Convener: Philip Bambade (Laboratoire de l''Accelerateur Lineaire (LAL) (IN2P3) (LAL))

7 Impact of beam parameters and conditions on BSM reconstruction

(remotely)

Speaker: Dr Kiyoshi Kubo (KEK)

Slides IPBSM_response_to.pdf IPBSM_response_to.ppt

8 Priorities towards goal 1 before April and up to summer 2013

(remotely)

Speaker: Dr Kiyoshi Kubo (KEK)

Slides Draft_Near_Future_Plan_for_Goal_1.pdf Draft_Near_Future_Plan_for_Goal_1.ppt

9 Discussion of planning, in particular preparing for new continuous run in spring 2013 and articulation with goal 2

All

10 Discussion of future aims and priorities for ATF2 beam parameters and related upgrades

All

11 Lunch

Review of IP-BPM chamber preparation and piezo-mover study

Conveners: Mr Frédéric Bogard (LAL), Mr Sandry Wallon (LAL)

12 Laboratory visit for demonstration and discussion in front of the hardware

All concerned

13 Coffee break

Beam halo studies: modeling, optical transfer issues, collimation, plans for measuring

Convener: Dr Glenn Christian (John Adams Institute of Accelerator Science, University of Oxford)

14 Recent study of halo propagation in ATF2 and first check of collimation

includes former contributions from Sha Bai (IHEP) and recent ones from Dou Wang (IHEP)

Speaker: Ms Shan Liu (LAL)

Slides Aper_study.pdf Aper_study.pptx

15 Issues for halo modeling and plans for estimating transverse and energy tails in the damping ring

based on input from Dou Wang (IHEP)

Speaker: Philip Bambade (Laboratoire de l''Accelerateur Lineaire (LAL) (IN2P3) (LAL))

Slides ATF2_background_and_halo_study.pdf ATF2_background_and_halo_study.pptx

16 BDSIM-GEANT4 modeling of beam halo regeneration from vertical beamlosses in BDUMP beam pipe

(remotely)

Speaker: Mr Illia Khvastunov (University of Kiev)

Slides khvastunov_11_02.pdf

17 Discussion of issues and plans for halo measurement and collimation (EXT, FFS, post-IP)

All

Tuesday, 12 February

Review of IP-BPM electronics: electronics, performance testing and simulation, compare existing and new systems, discussion

Convener: Philip Bambade (Laboratoire de l''Accelerateur Lineaire (LAL) (IN2P3) (LAL))

18 Preparation and tests of new KNU IP-BPM electronics

Speaker: Mr Siwon Jang (KNU)

Slides Low-Q_IP-BPM_New_electronics_(LAL).pdf Low-Q_IP-BPM_New_electronics_(LAL).pptx

19 Experience and comparison of present IP-BPM electronics set-ups

Speaker: Ms YOUNGIM KIM (University of Oxford)

Slides 20130212FJPPLFKPPLWorkshop_YoungimKim.pdf

20 Discussion of issues switching from present electronics to new electronics

All

21 Coffee break

Jitter measurements and reconstruction of sources

Convener: Dr Andrea Jeremie (LAPP)

22 GM feedback studies: simulations and expected improvements

Speaker: Yves Renier (CERN)

Slides Possibility_to_detect_ground_motion.pdf

23 GM sensor tests and installation

Speaker: Dr Andrea Jeremie (LAPP)

Slides 15sensorschedule.pdf 15sensorschedule.pptx

24 Reconstruction of jitter sources

Speaker: Juergen Pfingstner (Technische Universitaet Graz)

Slides atf_jitter_orsay_2013.pdf atf_jitter_orsay_2013.ppt

25 Stability tests of IP-chamber and IP-BPMs

Speaker: Frédéric Bogard (LAL)

Slides BPM3_moving_characterization_with_PI_actuators.pdf

26 Discussion on possible ideas of vibration measurements on IP-BPM optical table support and possible interefometer measurements at KEK

Speakers: Dr Andrea Jeremie (LAPP), Frédéric Bogard (LAL), Philip Bambade (Laboratoire de l''Accelerateur Lineaire (LAL) (IN2P3) (LAL)), Mr Sandry WALLON (LAL-CNRS)

Slides discussionIPBPM.pdf discussionIPBPM.pptx

27 Lunch

Planning for IP-BPM installation

preparatory work, installation procedures for mount/demount, access to IP area, compatibility with IPBSM procedures, schedule decision

Conveners: Nobuhiro Terunuma (KEK), Mr Sakae ARAKI (KEK)

28 Preparations for shipment and installation of IP-BPM chamber and mechanics, mount/demount procedures, issues

includes 10 minutes discussion

Speaker: Mr Sandry WALLON (LAL-CNRS)

Slides ATF2_IP_Chamber_for_IP-BPM_-_shipment,_istallation_and_other_-_12_Feb._2013_-_Sandry_WALLON,_LAL_Orsay.pdf

29 Cabling and controls aspects, issues for testing at KEK

includes 10 minutes discussion

Speaker: Frédéric Bogard (LAL)

Slides 13-02-12_Electrical_wiring_for_piezo_movers_and_temp_probes.pdf

30 Requirements from IPBSM procedures and discussion of compatibility issues

includes 10 minutes discussion

Speaker: Nobuhiro Terunuma (KEK)

Slides LAL-2013-02-12.pdf LAL-2013-02-12.pptx

31 Discussion of organization and planning for the installation

decision taking into account both general hardware maintenance, goal 1 considerations and other schedule constraints - All

32 Coffee break

Planning for IP feedback studies with IP-BPMs

define goals, integrated feedback strategy including upstream and IP, issues,...

Convener: Dr Glenn Christian (John Adams Institute of Accelerator Science, University of Oxford)

slides IPFB_discussion.pdf

33 Workshop Dinner

Wednesday, 13 February

Planning for first beam test of IP-BPMs at IP

signal characterisation, optimised processing, beam based alignment, calibration,...

Convener: Dr Toshiaki Tauchi (KEK)

34 First plans for new IP-BPM testing at KEK

Speaker: Mr Siwon Jang (KNU)

Slides First_plans_for_new_IP-BPM_testing_at_KEK.pdf

35 Experience from beam measurements with present IP-BPMs

Speaker: Ms YOUNGIM KIM (University of Oxford)

Slides 20130213_FJPPLFKPPL_IPBPM_yikim.pdf

36 Discussion of aims and schedule of first commissioning, including availability

All

37 Coffee break

Future plan for strong field physics studies

laser upgrade, post-IP area redessign, development of diamond sensor instrumentation

Convener: Philip Bambade (Laboratoire de l''Accelerateur Lineaire (LAL) (IN2P3) (LAL))

38 Status and initial results of diamond sensor development for halo and Compton backscattered electron measurements after the IP

Speaker: Ms Shan Liu (LAL)

Slides Test_of_Diamond_Sensors_at_PHIL.pdf

39 Ideas and plans for strong field physics studies at ATF2

Speaker: Dr Toshiaki Tauchi (KEK)

Slides atf2-future-experiment-tauchi.pdf

40 Discussion and meeting close-out

41 Lunch