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Review of the needs for a hollow e-lens for the HL-LHC

from Thursday 6 October 2016 (08:45) to Friday 7 October 2016 (17:30)
CERN (30/7-018)

        : Sessions
    /     : Talks
        : Breaks
6 Oct 2016
7 Oct 2016
AM
08:45
Welcome - Oliver Bruning (CERN) (until 09:00) (30/7-018 - Kjell Johnsen Auditorium)
08:45 Introduction - Oliver Bruning (CERN)   (30/7-018 - Kjell Johnsen Auditorium)
09:00
Introduction Session (until 09:45) (30/7-018 - Kjell Johnsen Auditorium)
09:00 Overview and introduction including an outline of the existing installation options, optics conditions, infrastructure requirements (cry, power), Tools for halo measurement and timeline (planning need for the technical design etc.) - Stefano Redaelli (CERN)   (30/7-018 - Kjell Johnsen Auditorium)
09:30 Discussion   (30/7-018 - Kjell Johnsen Auditorium)
09:45
Session on operational experience and extrapolation to HL-LHC parameters (until 17:05) (30/7-018 - Kjell Johnsen Auditorium)
09:45 Loss and lifetime observations during nominal operation and their extrapolation to HL-LHC parameters. - Belen Maria Salvachua Ferrando (CERN)   (30/7-018 - Kjell Johnsen Auditorium)
10:15 Discussion   (30/7-018 - Kjell Johnsen Auditorium)
10:30 What did we learn about HALO population during LRBB studies and MDs? - Yannis Papaphilippou (CERN)   (30/7-018 - Kjell Johnsen Auditorium)
10:50 Discussion   (30/7-018 - Kjell Johnsen Auditorium)
11:00 --- Coffee break & Group picture ---
11:30 What did we learn about HALO population during MDs and regular operation? - Gianluca Valentino (University of Malta (MT))   (30/7-018 - Kjell Johnsen Auditorium)
11:50 Discussion   (30/7-018 - Kjell Johnsen Auditorium)
12:00 Observations and measurements on the impact of earthquakes and cultural noise on the LHC operation and their extrapolation to HL-LHC parameters. - Michaela Schaumann (CERN)   (30/7-018 - Kjell Johnsen Auditorium)
12:30 Discussion   (30/7-018 - Kjell Johnsen Auditorium)
12:45 --- Lunch break ---
14:15 Operational experience from HERA and their extrapolation to the HL-LHC - Mike Seidel (PSI)   (30/7-018 - Kjell Johnsen Auditorium)
14:35 Discussion   (30/7-018 - Kjell Johnsen Auditorium)
14:45 Operational experience of RHIC electron lenses and their effect on collimation and halo populations - Wolfram Fischer (BNL)   (30/7-018 - Kjell Johnsen Auditorium)
15:05 Discussion   (30/7-018 - Kjell Johnsen Auditorium)
15:15 Operational experience from Tevatron and relevance for HL-LHC - Alexander Valishev (Fermilab) Miriam Fitterer   (30/7-018 - Kjell Johnsen Auditorium)
15:50 Discussion   (30/7-018 - Kjell Johnsen Auditorium)
16:05 --- Coffee break ---
16:35 Expectations (extrapolated from LHC operation) for the beam lifetime and halo population based on scaling from the LHC observations for radiation damping and IBS excitation. - Fanouria Antoniou (CERN)   (30/7-018 - Kjell Johnsen Auditorium)
16:55 Discussion   (30/7-018 - Kjell Johnsen Auditorium)
09:00
Session on HL-LHC system specifics (until 12:30) (30/7-018 - Kjell Johnsen Auditorium)
09:00 Measured effects of depleted halo population with hollow e-lens and relevance for HL-LHC - Giulio Stancari (Fermi National Accelerator Laboratory)   (30/7-018 - Kjell Johnsen Auditorium)
09:20 Discussion   (30/7-018 - Kjell Johnsen Auditorium)
09:30 Alternative methods for halo depletion (damper and tune modulation [ and wire]), long range beam-beam and comparison of their performance / reliability to that of a hollow electron lens. - Roderik Bruce (CERN)   (30/7-018 - Kjell Johnsen Auditorium)
10:00 Discussion   (30/7-018 - Kjell Johnsen Auditorium)
10:15 Potential performance reach for the HL-LHC in case of a depleted beam halo - Gianluigi Arduini (CERN)   (30/7-018 - Kjell Johnsen Auditorium)
10:45 Discussion   (30/7-018 - Kjell Johnsen Auditorium)
11:00 --- Coffee break ---
11:30 Reserve session for additional presentation requests from Day 1 of the Review   (30/7-018 - Kjell Johnsen Auditorium)
PM
17:05
Session on HL-LHC system specifics (until 18:35) (30/7-018 - Kjell Johnsen Auditorium)
17:05 RF overview of the Crab Cavity system for HL-LHC with presentation on potential failure modes and summary of the KEK operation experience. - Rama Calaga (CERN)   (30/7-018 - Kjell Johnsen Auditorium)
17:35 Discussion   (30/7-018 - Kjell Johnsen Auditorium)
17:50 Potential failure scenarios in the HL-LHC machine that can lead to very fast orbit changes (e.g. missing beam-beam kicks, damper failure scenarios, Crab cavity failure scenarios etc) and the resulting machine protection requirements for HL-LHC operation (with input from collimation team). - Daniel Wollmann (CERN)   (30/7-018 - Kjell Johnsen Auditorium)
18:20 Discussion   (30/7-018 - Kjell Johnsen Auditorium)
12:30
Work lunch for reviewers (until 14:00) ()
14:00
Closed session for report writing (until 16:30) (30/2-040)
16:30 Closeout - Rudiger Schmidt (CERN)   (30/7-018 - Kjell Johnsen Auditorium)
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