- IMPEDANCE AND SINGLE-BEAM COHERENT INSTABILITIES:
- The related presentations are posted on the CERN impedance web page.
- Web impedance meetings are organised by Benoit Salvant: (1) 14/09/2010, (2) 24/11/2010, (3) 28/02/2011.
- Collective effects for the beta-beams (Beta Beams EUROnu WP4) => Followed up by Christian Hansen:
- Talks by CH at WP4 meetings:
- 4th meeting, 19/02/2010, Paris => Status of collective effects studies.
- 5th meeting, 02/06/2010, Strasbourg => Status of collective effects studies.
- 6th meeting, 08/11/2010, Legnaro => Collective effect and RF studies for the decay ring.
- Talk by CH at the ICE meeting held on 22/09/10 => Collective effects studies for beta-beams in the decay ring (key and pdf).
- SPACE CHARGE:
- Alexander Molodozhentsev came for two weeks at CERN from October 4 to 15, 2010, (just after the HB2010 workshop) to install the PTC+ORBIT code and explain us in detail how to use it efficiently. He worked essentially with Frank Schmidt (already in collaboration with Etienne Forest for PTC) and Christian Carli (who uses the classical ORBIT code to study space charge issues in the CERN PSB with the new LINAC4).
- See also Alexander's talk at the ICE meeting held on 06/10/10.
- ECLOUD:
- Related presentations:
- Talk by FZ at the LHCBCWG held on 09/11/2010 => E-cloud build-up & instabilities: expectations, observations and outlook.
- Talk by FZ at the ICE meeting held on 24/11/10 => Electron-Cloud activities for LHC.
- Old link to ecloud in the LHC.
- Ecloud meetings are organised by Frank Zimmermann: (1) 26/11/2010, (2) 14/12/2010, (3) 07/01/2011, (4) 17/01/2011, (5) 21/01/2011, (6) 11/02/2011.
- BEAM-BEAM:
- Related presentations:
- Talk by EL at the LHCBCWG:
- 04/05/2010: First beam-beam observations at high intensity collisions.
- Talks by WH at the LHCBCWG:
- 22/06/2010: Observations with colliding beams.
- 06/07/2010: Beam-beam observations during stable beams.
- 13/07/2010: Update on beam observations during stable beams => It seems they are the same slides as on 06/07/2010 (WH and Malika informed on 21/12/2010).
- 27/07/2010: Update on beam observations during stable beams.
- 14/09/2010: Bunch trains and crossing angles at injection.
- 26/10/2010: Beam-beam observations.
- 16/11/2010: Updates on beam-beam observations.
- Talk by GP at the LHCBCWG:
- 03/08/2010: Bunch-by-bunch beam losses and collision patterns.
- 17/08/2010: Bunch-by-bunch beam losses and collision patterns.
- Talk by TP at the ICE meeting held on 15/09/2010 => Review of some beam-beam predictions for the LHC.
- Talk by FS at the ICE meeting held on 10/11/2010 => Trip reports and software plans for the upgrade.
- Talk by WH at the Evian December 2010 workshop => LHC beam beam.
- Old link to LHC beam-beam studies.
- No beam-beam meetings in 2010=> Beam-beam meetings will be organised in 2011. Pending issues:
1) Possibility to make some tracking with SIXTRACK when betax* ≠ betay*, called flat beams. It is worth mentioning that 3 cases might be referred to as flat beams: betax* ≠ betay* (the case of interest here), epsx ≠ epsy and flat longitudinal distribution. In the case of betax* ≠ betay*, the output of MADX is fine (it is well computed) but the problem is then the data transfer between MADX and SIXTRACK => Not all the parameters (betas, sizes, intensities) are transferred. For the other two "flat" cases it should be fine.
2) 6D beam-beam lens (in fact it is 4D + time dependence) => We need this even if the strong beam is a single particle. There is a lens in SIXTRACK but it is not debugged. For instance it is not clear if the crossing angle is defined for the strong or the weak beam.
3) Effect of the 6D beam-beam lens on the strong beam => Both the divergence effect of the strong beam and crab tilt.
- BETA BEAMS:
- Web page (Beta Beams, EUROnu WP4): https://espace.cern.ch/betanu/default.aspx.
- Elena Wildner's (EUROnu WP4 - Beta Beam- Coordinator) review talk at ICE meeting 22/09/10: https://emetral.web.cern.ch/emetral/ICEsection/Meeting_22-09-10/Section%20meeting%2022-09-10.ppt.
- Elena Benedetto's plenary talk at NUFACT'10, XII International Workshop on Neutrino Factories, Super beams and Beta beams (20-25 Oct. 2010, Mumbay): http://www.ino.tifr.res.in/MaKaC/getFile.py/access?contribId=39&sessionId=2&resId=0&materialId=slides&confId=68.
- Beta-Beams Production Ring and Ionization cooling ==> Followed up by Elena Benedetto:
- EB talk at ICE meeting 22/9/10: https://emetral.web.cern.ch/emetral/ICEsection/Meeting_22-09-10/EB_ICE_221010.ppt.
- Talks by EB at WP4 meetings: https://espace.cern.ch/betanu/MeetingsWP4/Meetings.aspx.