MICE RF – Installation at RAL Tim Stanley, MICE RF Engineer, RAL 2 June 2014.

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Presentation transcript:

MICE RF – Installation at RAL Tim Stanley, MICE RF Engineer, RAL 2 June 2014

RF Amplifiers – Performance at DL

RF Amplifiers - Performance 2 MW RF output was achieved at Daresbury, in July 2013, on amplifier chain #1. PSU trips were mitigated to allow high enough HT supply voltage (35 kV) to achieve the 2 MW RF Amplifiers and PSU racks were dismantled and arrived at RAL MICE Hall mid-August.

TIARA System – Plan A

End-stage, ground floorDriver stage and PSU racks

TIARA System – Plan B

Preparations for Installation Alternative layout, of o/p co-ax, was implemented; avoided further delays in lead-time for upper floor mods. Limited demonstration, for TIARA milestone, to 500 kW Safety Case document written by TS, and approved by ISIS- MICE Safety board. – Included Risk Assessment and Method Statement – Included HT, ionising and non-ionising radiation safety – Radiation monitoring schemes were developed in conjunction with RAL Radiation Protection Superviser TS appointed EMF Protection Advisor. (RF and microwave fields).

Procurement of RF Components MEGA, in the USA, fulfilled full order of parts for entire MICE RF (full Step VI)system. Importation, under MoU, via Univeristy of Mississippi, achieved late September Many components of the RF system were procured by University of Mississippi under and MRI grant; thanks to Don Summers, and his colleagues.

Procurement of RF Components Components included: Co-ax RF transmission-lines for the whole project (a vast consignment!) HT reservoir capacitors HT charging PSUs LLRF boards 3 new 4616 tubes and an amplifier i/p cavity

Procurement of RF Components MoU allowed waiver of UK import taxes Several components immediately used for build of amplifier system #1 for TIARA milestone

Arrival of a batch of TX lines at RAL

6” co-ax

6” co-ax – assembly practice

Mechanical Installation PSU and Control racks (5) craned into position during August. End-stage amplifier craned-in during September

Mechanical Installation – End-stage

Mechanical Inst: HT PSU and SSPA

Mechanical Inst – HT PSU Rack 2

Mechanical Installation Co-ax feeds from Driver stage to Endstage, and Endstage to Dummy-load, were fitted; co- ax is rigid piping. Careful, accurate siting of amplifiers required. Laser-based survey imminent. For full runs to cavities, considering some pre- assembly and fitting-checks in R9 lab at RAL in due course.

Mechanical Installation – 3” co-ax

Mechanical installation Driver stage accurately fixed in position

Electrical Installation Done by DL engineers with local Elec technician at RAL Some re-work required owing to config of End-stage HT port.

Services - Water De-mineralised cooling water supply plumbed to MICE RF area. Dedicated closed-loop, but shares cooling with chilling system for magnets. Aimed for 21 to 24 degrees C at flow input. New system will be fully separate. Flow-rates per water circuit, and conductivity at flow and return, were monitored and used for safety-trips. (Conductivity < 0.5 uS/m achieved)

Services - Water 8-channel water distribution panel quickly designed by sub-contractor. Performed OK but RAL design review likely to improve fit in the confined space for RF plant in the MICE Hall Bleeding-points, in 4616 amplifiers, to be fitted.

Services - Water

Services - Air Supply, of dry and clean compressed air, provided to RF area in MICE Hall; local distribution and interlocks fitted. STEP V system will need nitrogen pressurisation of co-ax TX lines (~ 2 Bar) to improve voltage stand-off.

Programme Owing to protracted test-programme at DL to mid-2013, to resolve technical issues, RAL installation programme was very compressed. However, teams, at RAL and DL, were able to bring a high level of commitment to the project, within the constraints of other high-priority work. Avoiding the proposed mods., to mezzanine floor, won some time. EMR Runs during October reduced hall-time by ~ two weeks.

Staff MICE mechanical and electrical fitting work relied heavily on two RAL technician staff. Two more technicians now being hired for the project.

TIARA Milestone Success Dec Amplifier chain functional; 531 kW RF power delivered to load; TIARA milestone achieved! Two weeks ahead of deadline.

Ready for Testing

RF Powers in MICE Hall

Rogues Gallery

2014 Amplifiers were further run for detailed operating familiarisation by Tim S and Pierrick H. Good preparation for generating protocols for design of remote-control system this year. All 5 PSU racks, and 4616 amplifier, returned to DL in April, for re-assembly RF testing, at DL, to resume ~ Summer 2014

Tentative Programme RF amplifiers #2 aim to be ready and tested by end of FY 2014/15 Lock-out from MICE Hall, for STEP IV running, for one year from April 2015 PSU racks #2 aim to be ready by end of FY 2015/16 Installation of two amplifier systems at RAL for STEP V readiness during 2017

Tentative Programme Perhaps introduce test cavity to pre-testing programme Build of X-ray screening would be required

Enhancement of STEP V?? Perhaps option to increase E-field with amplifiers systems 3 and 4. Would need some re-config. of co-ax layout and some new components. Might invoke SF6 pressurisation of lines.