Proposal to stop beam on the Tungsten absorbers on the right side was discussed. Nice because we get to check all warm magnets in IR3. However, greater stopping power of W means higher localised radiation - not a good solution for this reason. (Doris notes W could push radiation level to 1 mSV/hour necessitating a extended radiation veto).
The radiation veto will most likely also be put in case of the beam on the primary (carbon) collimator. There is a good chance that we are locally above 50 uSv/h. Depending on the intensities lost on the other equipments along the beam line, a limited chance exists also that the radiation veto will not only affect the area around point 3.
See Helmut Vincke's presentation at the eLTC.
Compromise suggested by Paul: use primaries to left of IP3 and then towards end of test open to allow some beam onto W absorbers. Will try this.
Collimator refurbishment finished. TDI to be done this week (week 30).
Oliver Aberle named as contact person for all collimator operations. Note danger of damage in trying to move blocked collimator.
Priority given to S12 and S23.
The powering tests are almost completed in the arc and in the matching section of point 2R except in the Q6.R8 cryostat, which will be released for ELQA next Wednesday after the resolution of the helium level control problems. The installation of the heaters and temperature sensors of the 600 A leads of the DFBXD is over and it is being cooled down. The boil-off tests will be performed on Monday prior to the ELQA tests.
Q6.L3, some issue about DSL and simultaneous operation of this and Q6.R3. Check.
Injection permit to be tested week 30. Full test of communications and injection permits - Thursday before test. Vacuum valves open.
Tunnel cleaning of S12 and S23 week 29 and week 30. (c/o Katy Foraz)
Status of extraction BIC, injection BIC and ring BIC summarized by Bruno Puccio. His presentation here.
Go/no go on systems to be enabled 4th August. Final tests to be performed just before beam with both TEDs out.
New hardware for SPS re-phasing to be commission at the start of week 30. (Andy Butterworth)
Beam instrumentation available for injection test summarized by Lars Jensen. His presentation here.
Decided to connect BLMs to BIS - very useful first operational experience. To be checked very thoroughily in Dry Runs.
Will try and acquire 1 Hz RS, XPOC and Study buffer data from BLMs.
Sum signal available at Q8.L2 and Q8.R3.
Mike Lamont 27/7/08