MECHANICAL DESIGNOF TCSP COLLIMATORSSecondary Collimators Embedding BPMs

L. GENTINI, A. Dallocchio, A. Bertarelli, F. Carra, M. Garlasche

Luca Gentini EN/MME 30/04/2012 2/18

• Guidelines for conceptual design• Main design features:

- TCS vs. TCSP; TCTP vs. TCSP

- Cooling system

- Embedded BPMs

- RF system (ferrite + screen)

• Assembly procedure:

- Cooling pipes, stiffener, JAW, graphite block

- Brazing

• Present status

CONTENTS

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TCSP CONCEPTUAL DESIGN: GUIDELINES

• Vacuum tank (equal to TCTP collimator)• Actuation system (equal to TCTP collimator)• JAW assembly

• Clamped CFC jaw (from TCS design).• Glidcop back-stiffener + Glidcop tapering embedding BPMs (from TCTP design).

• Cooling system (equal to TCTP collimator):• Square pipes (9 mm CuNi).• 2 inlet on one side, 2 outlet on the other side.• 6 cooling pipes in the central cross-section.

• Beam Instrumentation (equal to TCTP collimator):• 2 embedded BPMs on each JAW.• 2 temperature probes on each JAW.• RF system (ferrite tiles + screens).

Luca Gentini EN/MME 30/04/2012 4/18

JAW ASSEMBLY: TCS VS. TCSP

Absorber block (AC150 2-d C/C)Jaw block (AC150 2D CFC)

Plate support (Glidcop)Contact plate (Glidcop)

Tensioning system: Clamps + springs + plates

TCS RF system: RF contacts (CuBe C17200)

TCSP RF system : screen (St.Steel 304L) + ferriteTCS cross-section TCSP cross-section

Main differences:• Embedded BPMs• RF system

Tensioning system: Clamps + springs + plates

Tensioning system: Clamps + springs + plates

Clamping system: clamps + springs + plates

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TCTP cross-section TCSP cross-section

RF system : screen (St.Steel 304L) + ferrite

TCSP Collimator shares with TCTP the cooling system as well as the RF system (except few details shown in next slides).

RF system : screen (St.Steel 304L) + ferrite

JAW ASSEMBLY: TCTP VS. TCSP

Cooling system: CuNi bent pipesCooling system: CuNi bent pipes

Luca Gentini EN/MME 30/04/2012 6/18

TCSP BEAM INSTRUMENTATION: EMBEDDED BPMS

• The BPM is screwed on the tapering.• Adjustment system to align the pick-up• The area around the BPM is cooled.

BPM sectionTemperature probe

Probe cable support

BPM

BPM adjustment

system

Glidcop tapering

CFC Jaw

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• BPM are both on the exit flange side.• Two BPM cable supports are fixed on the RF screens.• Cable layout similar to TCTP collimator →minimization of stresses

on cables due to jaw movements.

BPM cable support

BPM

BPM cable support

BPM cable supportBPM cable support

BPM Cable Support

~260

mm

TCSP BEAM INSTRUMENTATION: BPM CABLES

Luca Gentini EN/MME 30/04/2012 8/18

TCSP RF SYSTEM 1/4

RF CONTACTS:• 2x RF contacts (CuBe C17200) between graphite and tapering on each JAW. • 4x RF contacts (CuBe C17410 with silver coating) between JAWs and vacuum tank.

RF contact (CuBe C17200)

RF contact (CuBE C17410)

Tapering (Glidcop)

Jaw block (AC150 2D CFC)

Slope 16°(equal to TCTP)

Slope 16.5°(17.7 °for TCTP)

Luca Gentini EN/MME 30/04/2012 9/18

TCSP RF SYSTEM 2/4

TCSP RF SYSTEM:• Ferrite tiles + screens• Equal to TCTP collimator

Positioning pin

Ferrite clamp (St. Steel 304L)

Ferrite housing (copper with chrome oxide coating)

Clamps (Glidcop)

30 mm

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TCSP RF SYSTEM 3/4

GAP 0.2 mm

Ferrite tiles (equal to TCTP collimator)

Screen (equal to TCTP collimator)

Luca Gentini EN/MME 30/04/2012 11/18

GAP 0.2mm

TCSP RF SYSTEM 3/4

Question for the RF Team:

Is this small gap disturbing for the RF performances of the TCSP collimators?

“RF trapped” volume?

Luca Gentini EN/MME 30/04/2012 12/18

TCSP RF SYSTEM: EXTRIMITIES RF CONTACTS• Same RF contacts of phase I collimators, phase II, TCTP, etc… (CuBe C17410)

Tank RF contacts(CuBe C17410 with

silver coating)

JAW RF contacts(CuBe C17410 with

silver coating)

TCSP RF SYSTEM 4/4

Luca Gentini EN/MME 30/04/2012 13/18

COOLING SYSTEM

INLET OUTLET

TCS cooling pipes

TCTP/TCSP cooling pipes

OPTIMIZED TCTP/TCSP COOLING SYSTEM• Larger cooled area.• Inlet pipes serving central region.• To assure a good brazing, the under load planarity

of the pipe assembly must be <0.05 mm.

Contact areasCooled area

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COOLING PIPES ASSEMBLY PROCEDURE

X

Z

Y

PIPE 1PIPE 2

TCSP ASSEMBLY PROCEDURE

(Pipe 2 is fixed)

1. Insert pipe 1.

2. Put up pipe 1.

3. Rotate Pipe 1 in Y axle of 90°.

4. Move Pipe 1 in Y of around 10 mm.

5. Move pipe 1 in X of around 10 mm.

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X

Z

Y

BACK STIFFENER ASSEMBLY PROCEDURE

Insert the back-stiffener.

TCSP ASSEMBLY PROCEDURE

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TCSP ASSEMBLY PROCEDURE

JAW ASSEMBLY PROCEDURE1. Brazing of back stiffener / cooling

pipes / glidcop plate / tightness cups / connection sockets / probe supports.

2. Final machining of Glidcop plate.

3. Assembly the guiding plates using the machined surfaces as a reference for positioning and drilling-through.

4. Install springs and spring support plate using the screw M8x25 to compress the springs.

5. Install 2x taperings and Pick-up BPM assemblies.

6. Install 2x RF contacts.

7. Install CFC jaw bloc, the upper and bottom clamps and block them with the holding clips.

8. Remove the screw M8x25 on the back of the JAW.

Luca Gentini EN/MME 30/04/2012 17/18

TCSP PROJECT STATUS

30-04-2012 Design 3D models

Drawings

Controls

Vacuum tank 100% 100% 100% 100%Actuation system

100% 100% 100% 100%

Jaw assembly 100% 100% 100% 20%Test and assembly tools

100% 100% 100% 100%

Luca Gentini EN/MME 30/04/2012 18/18

Thank you for your attention!