Relocation of Daresbury MEIS to Huddersfield
University
Paul BaileyUK MEIS Facility
STFC Daresbury Laboratory, UK
Huddersfield8th December 2011
Daresbury MEIS
Daresbury MEIS
Huddersfield8th December 2011
Huddersfield8th December 2011
Daresbury MEIS
Important Aspects of the New Machine
Huddersfield8th December 2011
Some components are contaminated with 14C and 3H (very low level)Every component removed has to be cleared for radiation, recorded and labelled
The ion source and power supplies need to float to high ~ 200 kV voltageso require a high voltage platform
Need to design and manufacture a 200 kV acceleration lens
Need to consider the state of the control system
Radioactivity
Huddersfield8th December 2011
Some components are contaminated with 14C and 3H (very low level)Every component removed has to be cleared for radiation, recorded and labelled
High Voltage Platform
Huddersfield8th December 2011
2 spare insulating legsrated at 500 kV havebeen split into 4 ratedat 250 kV
maximum beam energywas 500 kVwe only ever used upto 200 kVso limit new facility to200 kV
0.75 m
Acceleration lens
Huddersfield8th December 2011
We need an acceleration lens to increase the beam energy from
20 kV up the final energy
Usually use 100 kV, but 200 kV maximum is needed
The one we use is 14C contaminated – no good!
So, we get one made by ‘beefing up’ Jaap’s 100 kV design
But the manufacturer cannot accommodate the size required
So we buy 2 100 kV lenses
But the cost goes up to £20k
We have a spare but this is labelled as 3H contaminated – any good?
Testing reveals no discernable activity – good!
Acceleration lens
Huddersfield8th December 2011
Close inspection reveals a modular construction
1.5 m
Acceleration lens
Huddersfield8th December 2011
Should be OK if we can dismantle it without damage
Control System
Huddersfield8th December 2011
Whilst MEIS has a working control system, we have no expertise
or support if something goes wrong
Essentially we have been using it on ‘borrowed’ time
We need a control system because of the complexity of MEIS and
because we have power supplies that float at high voltages
Do we try and use the existing control system?
What are the alternatives?
Control System(s)
Huddersfield8th December 2011
A simple way to control at high voltages
Control System(s)
Huddersfield8th December 2011
A better way?
Control System(s)
Huddersfield8th December 2011
Control System(s)
Huddersfield8th December 2011
Unfortunately... this is the wiring for one EQT
Control System
Huddersfield8th December 2011
The plan is - to bring the existing system to Huddersfield
But, I think we need to look at alternatives with some haste
liftingframe
HT platform1.5x2.0
HT enclosure3.5x3.5
Raised floor5.5x5.5
Accommodation
11.0 m
Beamline Magnet
Huddersfield8th December 2011
We have a smaller magnet which is much lighter (existing is 5 Tonnes)
But its horizontal focusing is too strong
Relocation of Daresbury MEIS to Huddersfield
University
Paul BaileyUK MEIS Facility
International Institute for Accelerator Applications
Huddersfield University, UK
Huddersfield8th December 2011
Huddersfield8th December 2011