LHC beam commissioning workshop - Evian 19-20 January 2010

Performance, measurements vs. expectations, problems encountered, is related software sufficient, necessary improvements, appropriate for 3.5TeV running?

Performance, measurements vs. expectations, problems encountered, is related software sufficient, necessary improvements, appropriate for 3.5TeV running?

Performance, measurements vs. expectations, problems encountered, is related software sufficient, necessary improvements, appropriate for 3.5TeV running?

Performance of tune, chromaticity and coupling measurement system (BBQ and PLL). Status of feedbacks.

Observations of unexpected features in tune spectra (8 kHz, modulation, "the hump").

Performance, measurements vs. expectations, problems encountered, is related software sufficient, necessary improvements, appropriate for 3.5TeV running?

- Performance, observations, problems encountered
- Losses and transmission: estrapolation for higher intensities?
- Feed-forward vs. feedback: orbit, tune, chroma
- Setting incorporation for various systems: tune, chroma, ... RF, collimators
- Is related software sufficient, necessary improvements, appropriate for 3.5TeV running?

- Performance, observations, problems encountered
- Review optics requirements for 2010 in all points
- Commissioning base-line and possible issues
- Settings of protection devices
- Is related software sufficient, necessary improvements, appropriate for 3.5TeV running?

- Results from first operation, news for 2010.
- Performance, measurements vs. expectations (improvements of online model)
- Strategy to bring up luminosity performance
- Optimized behaviour vs energy and beta* -> How to handle this in LSA
- Problems encountered, is related software sufficient, necessary improvements, appropriate for 3.5TeV running?

- Revise estimates and requirements for operation at higher energies
- Model for decay and snap-back
- LSA implementation is adequate?
- Additional measurement program to update the model

- Experimental conditions
- Integration of experiment magnets
- Ramp strategy for spectrometers
- Experience with the handshake
- Requests, suggestions?

Feedback from operational experience- What can be improved? 

The Beam Interlock System (BIS) and Safe Machine Parameters (SMP) system are central to the protection of the Large Hadron Collider (LHC) machine.
The BIS has been critical for the safe operation of LHC from the first day of operation. It has been installed and commissioned, only minor enhancements are required in order to accommodate all future LHC machine protection requirements.
At reduced intensity, the SMP system is less critical for LHC operation. As such, the current system satisfies the 2010 operational requirements. Further developments are required, both at the SMP Controller level, and at the system level, in order to accommodate the requirements of the LHC beyond 2010

The LHC collimation system has been used for beam cleaning and passive machine protection this year for the first time. The hardware commissioning tests carried out in preparation for operations with beam are presented. Setup procedure towards nominal injection settings is analyzed together with reproducibility and total beam time spent for collimator setup. Locations of beam losses are reviewed and reasons for the highest losses investigated. The achieved cleaning efficiency is also discussed. Operational performance and stability of the system, interlock thresholds and interlock statistics (number of false interlocks generated) are treated. Software procedures, settings and threshold limits are analyzed, also in view of machine protection. Finally, plans for higher intensity operation and improvements (both on a short and long term) are presented.

The performance of the beam dumping systems and the abort gap cleaning are reviewed in the context of the general machine protection system. Details of the commissioning experience and setting up, encountered equipment problems, the experience with and status of the eXternal Post Operational Checks (XPOC) and the importance of operational procedures are presented for the beam dumping system. The brief experience with the abort gap cleaning is also presented. 

Plans for 2010 commissioning, allowing for higher beam intensity and energy, are given for both systems including some thoughts on the operational procedures required.

Results will be shown from the low-intensity beam commissioning of first, the moveable injection protection devices in the SPS to LHC transfer lines and downstream of the LHC injection kicker and second, the LHC dump protection elements in IR6.

The implications of these results and a commissioning status report with the further planning will be addressed.

Performance, measurements vs. expectations, problems encountered, is related software sufficient, necessary improvements, appropriate for 3.5TeV running?

More feedback from operational experience- What can be improved? 

some  keywords:  Improving rigor: procedures, checks, releases, testing, RBAC..

some keywords: Improving operational efficiency: sequencing, procedures, training, RBAC, testing

Feedback from operational experience- What can be improved? 

Expectations for 2010 in terms of integrated luminosity and energy. Physics potential given this.  Requirements in terms of beam intensity, beam size and bunch configuration. Specific requests for special physics running conditions".

Technical stop and likely maintenance requirements through the year.

Outline of key beam parameters for the 3.5 TeV run and possible increase in energy (transverse and longitudinal). Potential machine performance.

Recall any optics issues and constraints.

Cunning plan for continued commissioning: ramp to 3.5 TeV, squeeze, collisions etc. Prerequisites for going beyond the safe beam limit and approach to increasing the intensity. Schedule for 2010.