ATOP Days 2009

Session

Session 3 - High intensity beams and radiation issues

5 Mar 2009, 09:00

AT Auditorium (CERN)

14. Review of the machine protection system in the SPS

Jorg Wenninger

05/03/2009, 09:00

In the past few years the SPS beam interlock systems have been entirely renovated. The core of the beam and extraction interlock systems are now made with the same electronic components than the LHC. Those system provide flexibility, a high level of safety and excellent post-mortem diagnostics. A new flexible Software Interlock System was designed for the SPS. Although together those two...

15. Review of the machine protection system in the PS complex

Klaus Hanke

05/03/2009, 09:30

The performance of interlocks and machine protection system in the PS complex machines and experimental areas in 2008 will be briefly reviewed from an operations point of view. In particular, some issues related to the ISOLDE proton request and possible cures will be presented. The implementation of a new BLM into the Linac2 access safety chain to protect the Linac4 work site and the possible...

16. RF limitations while running at high intensities in the injectors

Erk Jensen

05/03/2009, 09:45

RF limitations at high intensities are related to either the effects of increased beam loading or the passage through certain beam stability limits. The presentation will make an effort to quantify and compare the importance of these different effects in the machines constituting the injector chain (Linac2, PSB, PS, SPS).

17. ISOLDE radioactive air handling

Richard Catherall

05/03/2009, 10:35

The present PSB‐ISOLDE target area is designed to take the maximum possible booster beam of 3.2x1013 protons at 1 GeV per 1.2 seconds (average beam current of 4.3 uA and power 4.3 kW). However, at that the time of the design an average current of about 2 uA had been assumed for normal ISOLDE operation, the radiation levels and radioactivity levels had been calculated for 1013 protons per...

18. Status of RAMSES and ARCON radiation monitoring systems

Markus Widorski

05/03/2009, 11:05

The Safety Commission operates and maintains two different radiation monitoring systems to survey the levels of ionizing radiation at CERN and its environment. Recent installations like LHC, CNGS and CTF3 are equipped with a modern state of the art system (RAMSES) whereas the rest of CERN including the LHC injector chain relies on a system (ARCON), which had been already developed for LEP....

19. Supercycles in the SPS – towards full ppm operation and impact on the equipment

Jorg Wenninger

05/03/2009, 11:35

After having operated for countless years with machine settings that were strictly organized by supercycles, the SPS operations group is preparing the 2009 (not October!) revolution that will break up the supercycle constraints and organize settings by cycles, as it is done at the booster and the CPS. This presentation will motivate the reason for this revolution and explain the consequences...

20. Where do we stand 3 years after the recommendations from the BLRWG

Simone Gilardoni

05/03/2009, 11:50

Following the recommendations of BLRWG, an extensive campaign of studies have been done to reduce the losses in the different machines of the injector chain or better manage the impact of radiation. In particular, the discussion is focused on the work done to improve the situation of the PS and future studies.