O. Aberle (EN-STI-TCD) 1

TCDI operation until LS2

LIU-SPS-to-LHC Transfer Line Protection Devices (TCDI) Review

Oliver Aberle26/03/2014

2

Outline

• Actual Design

• Flexibility / Sacrificial?

• From a single unit towards couples?

• Modifications / Options

• ConclusionO. Aberle (EN-STI-TCD)

3

Actual Design

O. Aberle (EN-STI-TCD)

• Flange to flange length 1.34 m• Graphite blocks R4550, 1.2 m long, 37 mm thick,

clamped• 2 independent motors per jaw• Flatness over 1.2 m: 0.1 mm

Parallelism over 1.2 m: 0.1 mm• Alignement by survey: 0.1 mm

4

Actual Design

O. Aberle (EN-STI-TCD)

• Phase one table• Flange DN 60!• No RF fingers/ferrites• No water cooling• No quick connection (electrical or for

vacuum) • No plug-in for positioning

5

Flexibility / Sacrificial?

O. Aberle (EN-STI-TCD)

• Keep design featureso from TCDI/ring collimators (e.g. quick plugin, integrated BPM) and profit fromo collimator development (e.g. new materials, manufacturing technologies)

• Stay within the actual length for a mono-block jawo Two TCDIs with the existing design (1.2 m), maybe different jaw

material?o Jaw clamping system allows assembly of different materials on the same beamo Overall positioning precision TCDIs ~250 µm.o Relative positioning between the two neighboring TCDIs ~50 µm.o Would have 4 motors per TCDI “jaw”o Very important: Best knowledge of beam position

• With bellows etc.: 3.5 m for full flexibilityo Flexibility = exchange only first one in case of beam impact

O. Aberle (EN-STI-TCD) 6

7

From single unit towards couples?

• LIU TCDIs = long TCDIs• 1.9 m long TCDIs (for densities of graphite, BN)• Longer/low density – preferable for thermo-mechanics

(adding a second TCDI -> 2.4 m length)• Higher density for better efficiency

(start with Graphite, go to higher density downstream)

• 2 main options:o Stand alone unitso coupled units

O. Aberle (EN-STI-TCD)

8

From single unit towards

couples?

• 2 main options:o Stand alone unitso coupled units

• Pumping module allows for fast separation, remote handling and to use spare surface

O. Aberle (EN-STI-TCD)

3200 mm

9O. Aberle (EN-STI-TCD)

MKT vacuum connection

Modifications / Options

10

Modifications / Options

O. Aberle (EN-STI-TCD)

• Integrated BPMo Significant higher complexity of design

• Water cooling / RF issues

• Remote handling to be studiedo Several features available o Reduced tunnel space and different slope!

• Normal operation – low dose• Accident case – high dose, but fast cool down

(see Helmut’s talk)

11

Conclusion

• Stay close to dimensions of proven designo TCDI design for simpler, cheaper manufacturing, more material flexibilityo TCTP design has more optionso Pick form both options – other input (e.g. TDI?)

• Two units can do the job

• More studies needed (see previous talks)

• Feasibility to have new system ready for LS2

• Rough number for the budget: 500 kCHF / unito Options have a cost (cable length!, remote handling)

O. Aberle (EN-STI-TCD)