Transcript Document

RAL Integration Issues
Elwyn Baynham, Paul Drumm, Yury Ivanyushenkov, Tony Jones
RAL
MICE Collaboration Meeting, Osaka, August 1-3, 2004
1
Scope
• Layout
• Beam height
• Support structure
• Beam line shielding layout
2
MICE layout
3
Height of MICE beam
Dia 650
Aperture in ISIS wall
1524*
1684.2
Support structure
160*
Concrete floor
4
MICE support structure : Concept
• Requirements/specification:
- to move MICE modules out the beam (to the side direction) for various
MICE stages
( Qs: Do we need to move ALL modules?; Is the side direction preferable?)
• Accuracy/tolerances:
- along the beam
- across the beam
+/- 1 mm
+/- 1 mm
(Q: What position accuracy is required for module-to-module connection ?)
• Adjustment:
- adjustment possibility is required.
• Locking mechanism:
- required.
• Loads:
- max load is 3 (?) tonnes.
• Force transfer function:
- gravity force to the floor;
- module-to-module axial force to the floor ?
5
MICE support structure : Options
• Commercial rail system:
- usually high accuracy (+/- 0.1 mm )
( Q: Do we need it?)
- proven design;
- delivery times – days ( if off-the-shelf product);
BUT high cost.
• Simple slides arrangement:
- accuracy;
- cost;
- prototype.
6
MICE support structure: Commercial system
HEPCO SL2 stainless steel based slide system
Hepco Slide Systems Ltd, Devon England EX16 6TG
Item
Stock SL2 carriage (type AU SS L 76)
in assembled and adjusted condition
Price/each, £
460
Spacer slide (rail) SS NL 76
Length of 4.5 m in 3-m and 1.5-m sections 2475
No./MICE
module
Total No.
Total price,
k£
with VAT,
k£
4
28
12.880
15.134
2
14
34.650
40.714
Grand total, k£
55.848
Delivery time: 3-5 days
7
MICE support structure: Commercial system (2)
8
MICE support structure: Alternative solution
Simple slides arrangement
Platform
Sliding carriages
Low-friction material blocks
Rails
Concrete floor
9
MICE support structure vs. MICE stages
Problem: some of MICE modules will be located in various positions along
the beam for different stages of the experiment.
Possible solution: sliding rails (rails on rails).
Beam
MICE
module
Platform
20
HEPCO rail system
Steel plate
Bottom rails
80
160*
40
20
Concrete floor
10
Beam line and shielding layout
Beam line shielding:
• shields MICE against full beam loss in the ISIS beam pipe
(-> 2m of steel is required);
• is removable for access to PSI solenoid;
• ideally allows to work on the beam line components in the
MICE hall even when the ISIS beam is on
-> concept of temporary shielding.
11
Beam line and shielding layout
12
Beam line shielding
PSI solenoid
17-tonne magnet
Concrete shielding
ISIS wall
Existing steel
shielding
Steel shielding
Crane zone limits
13
PSI solenoid support structure and shielding
Concrete
ISIS
wall
Steel
shielding
14
Temporary shielding arrangement
Temporary steel shielding
These two magnets are in Off-beam position
PSI solenoid is in Test position
15
Next steps
• MICE general layout:
- start implementing MICE sub-systems (RF power system,
hydrogen system etc.) and magnetic shielding (requires more
modelling).
• Support structure:
- agree on requirement/specs;
- agree on concept;
- get cost estimations for various options.
• Beam line and shielding layout:
- finish detailed design;
- get OK from ISIS Radiation Safety Officer
16