Transcript Spectrometer solenoid update

Update
• Hardware for conductive cooling of the quench resistors has been fabricated
at LBNL. Preparation for installation to start this week.
• Installation method being written for the Wang tech to remove old resistor
system and installation of new system.
• The second radiation shield outer shell penetrations are being cut. End plates
have been machined. Old bore tubes being prepared.
• Both vacuum vessels have new holes plasma cut and have been ground
clean. Both are ready for the assembly phase.
• MAP tech board meeting yesterday.
• Some changes to the Testing and Operations section of the schedule to give a
more realistic timescale for the testing. This is the first iteration for the
testing methods, some timescale changes may be implemented at a later
date when more information has been collected.
• Control system requirements
Testing and Operations changes
• Soak testing of the coolers reduced from 2 weeks to 3 days.
• Thermal differences during soak test of the cryo coolers
• At the tapered joint on the 1st stage of the coolers
• At the single stage cooler
• All points of the radiation shield
• Warm bore using temperature probe
• Monitoring of the Heater / Helium Pressure feedback system
• Magnetic Mapping of the solenoids will not be a detailed analysis. The
current thinking is for a simple on beam axis measurement at the
approximate coil centres using a single Hall probe. Reduction from 3 weeks
to 1 day
• This measurement will be carried out in a single day after a steady state for the coils has been achieved.
• Coil Ramp / Operation with probable quench / re-cool after quench / thermal
characterization. Reduced from 6 weeks to 2 weeks.
• 1 – 2 Quench / cool cycles per day
Control System Requirement
• Previously stated required date
• 1st December for start of cool down.
• Mid November arrival requested to give time to debug / setup.
• Wang internal milestone.
• Wanting equipment onsite as soon as possible.
• Indicated date for requirement
• 31st January for start of cool down (errors found / updates in schedule
since e-mail).
• Shipping early Jan 2012.
• More conservative schedule.
• As soon as possible after completion of the AFC control system.
Milestones
1. Resistor/Diode Pack with conduction plate installed to Cold Mass – 19th
September.
2. Cold Mass ready for Helium leak checking – 22th September.
3. Machining work on Vacuum Vessel completed – 22nd September
4. Cold Mass ready for MLI wrapping – 28rd September
5. Assembly Starts on Upstream Spectrometer Solenoid – 11th October
6. Cold Mass and Shield inside the Vacuum Vessel – 31st October
7. Cold Mass aligned to the Vacuum Vessel – 9th November
~ Delivery of Upstream Solenoid to RAL – 16th April 2012
~ Delivery of Downstream Solenoid to RAL – 10th July 2012
R Preece/S Virostek 14/10/11