LHC Performance Workshop (Chamonix 2014)

Session

Session 1 - LS1, HW Commissioning, Powering Tests - Coming out of LS1

S1

22 Sept 2014, 09:00

Chamonix - Les Aiglons

Conveners

Session 1 - LS1, HW Commissioning, Powering Tests - Coming out of LS1

• Mirko Pojer
• Laurette Ponce

Description

[Chair: Mirko Pojer; Scientific secretary: Laurette Ponce]

Presentation materials

summary

Summary-Chamonix2014-v2_edited.docx

Summary-Chamonix2014-v2_edited.pdf

2. Non-conformities (solved and pending) on the Superconducting Circuits

Arjan Verweij

22/09/2014, 09:00

During LS1 all NC’s on the SC circuits limiting the operation to 4 TeV have been solved, so after LS1 the LHC can be run up to nominal design energy. However, still some NC’s remain, especially on the corrector circuits. In this talk an overview is given of the solved and remaining NC’s in the SC circuits.

3. Re-commissioning of the Superconducting Circuits

Matteo Solfaroli Camillocci

22/09/2014, 09:30

During LS1, the first planned LHC long shutdown, several modifications have been carried out on the technical systems, besides the superconducting circuits consolidation, with the goal of increasing the system performance and availability, while raising the energy to its design value. The plan and present status of the superconducting circuits re-commissioning is presented.

4. Other Non-solved NC's across the LHC Ring and Potential Impact on Performance

Vincent Baglin

22/09/2014, 10:00

During Run 1, several non conformities across the ring with impact on machine performances were identified and planned to be solved during the long shutdown 1. During this long shutdown, new non conformities were also produced and / or identified. In this talk, some of these non conformities are presented and discussed together with their impact on machine operation, technical stops and LS2.

6. Expected impact of hardware changes on impedance and beam induced heating during run 2

Benoit Salvant

22/09/2014, 11:00

During LS1, many hardware changes affected the beam surrounding (consolidations, upgrades and new equipment). The expected consequences of these changes on the LHC beam coupling impedance will be reviewed in this talk, as well as their consequences on the related intensity limitations: beam instabilities and beam induced RF heating. These collective effects have affected the performance of the...

5. ADT and RF after LS1

Andrew Butterworth (CERN)

22/09/2014, 11:30

During LS1a number of consolidations and upgrades have been undertaken in the LHC RF, including replacement of a cryomodule (four cavities, beam 2), upgrade of klystron collectors and new solid state crowbar systems. The RF parameters will be outlined in view of the consequences of the increased beam current and energy, and the exotic bunch spacing for the scrubbing beams. The LHC Transverse...

7. LBDS and Kickers after LS1

Wolfgang Bartmann

22/09/2014, 12:00

Modifications of the injection kickers(MKI) during LS1 will be reviewed together with the expected performance for the coming run with respect to heating and UFOs. The beam dump system has undergone several foreseen upgrades like a new link between the trigger synchronisation unit (TSU) to the beam interlock system, an additional retriggering line in case of TSU failure, a new dump...