Two-beam module review , 15-16 September 2009 Module layout and types

Two-beam module review, 15-16 September 2009

Module layout and types

G. Riddone for the CMWG, 15.09.2009

http://doc.cern.ch/archive/electronic/cern/others/PHO/photo-bul/bul-pho-2007-046_01.jpg


2

Content

Introduction

Mandate and Organization

Module Types

Module Configurations

Main requirements

Milestones

G. Riddone, TBM review, 15/09/2009


3 G. Riddone, TBM review, 15/09/2009

Module: 10462Accelerating structures: 71406 PETS: 35703MB quadrupoles: 1996 DB quadrupoles: 20924


4 G. Riddone, TBM review, 15/09/2009

Module: 2124Accelerating structures: 13156 PETS: 6578MB quadrupoles: 929 DB quadrupoles: 4248

500

GeV

3

TeV

No ch

ange

s in

the

mod

ule

desig

n


5

Two-beam module

A fundamental element of the CLIC concept is two-beam acceleration, where RF power is extracted from a high-current and low-energy beam (drive beam) in order to accelerate the low-current main beam to high energy (main beam).

Accelerating structure+100 MV/m, 64 MW, 229

mm

PETS-6.5 MV/m, 136 MW, 213

mm



6

CLIC two-module WG mandate


PURPOSE Detailed integration of the various CLIC technical systems of the drive beam decelerators and

the main beam accelerators into so called “CLIC modules”. The technical systems comprise:high-power rf structures, micron precision pre-alignment, nanometer stabilization, beam instrumentation, vacuum and electromagnets.

The module working group conducts the study and mechanical design, integration and fabrication issues, drives the cost estimate and provides feedback for other areas of the study.

MAIN TASKS Definition

overall layout, space reservation, number of components and their exact position and dimension system integration; interfaces between components, interference of

components layout of special regions (drive beam turn-around loops)

Set-up and keep up-to-date the related documentation, such as parameter specifications, and 3D models.

Module integration in the tunnel, including module transport and installation in collaboration with CES WG

Coordination role for the design and construction of the so called “104 Test Modules”

Cost estimate

The CMWG reports to the CTC, CTF3 Committee and RF Structure Committee.


7

Two-beam Modules “areas”


Test Modules


8

Organization


Working groupwith link persons for main

technical systems and interfaces

Collaborators

Technical systems- RF: I. Syratchev, W. Wuensch, R. Zennaro,- RF instrumentation: F. Peauger,

R. Zennaro- Beam instrumentation: L. Soby- Vacuum: C. Garion- Magnet: M. Modena- Pre-alignment:. F. Lackner,

H. Mainaud-Durand, T. Touzé- Stabilization: K. Artoos, A. Jeremie- Structure supports: N. Gazis

J. Huopana, R. Nousiainen- Beam feedback: H. Schmickler - Integration: A. Samoshkin

D. Gudkov;- Tunnel and Transport: J. Osborne, K. Kershaw

Interface toBeam physics: D. SchulteTransfer lines: B. JeanneretRadiation issues: S. Mallows

CEA/SaclayCIEMATDUBNA/JINRHIP/VTTLAPPPakistan, NCPPSIUPPSALAUniversity of Manchester …..


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Module systems and interactions

Cooling system

Assembly , Transport and

Installation

Vacuum system

RF system

Beam instrumentation

systemMagnet system / Magnet powering

system Supporting system

Stabilization system

Alignment system

Beam feedback system


Beam physics

Civil engineerin

g and service

Machine protection

and operation

Cost and schedule

Stabilisation WG


10

Activity flow

Basel

ine

for

CDR

Module design and system integration

Technical system design

TestsTe

st m

odul

es

(lab,

CLE

X)Alternatives

are also studied with the aim of

improving performance and/or reduce

cost


RF and beam dynamics constraints

Definition of technical

requirements


11

Module types and numbers


Type 0

Total per module8 accelerating structures8 wakefield monitors

4 PETS2 DB quadrupoles2 DB BPM

Total per linac (3 TeV)8374 standard modules

DB

MB


12

Module types and numbers


Total per linac (3 TeV)Quadrupole type 1: 154Quadrupole type 2: 634Quadrupole type 3: 477Quadrupole type 4: 731

Other modules- modules in the damping region (no structures)- modules with dedicated instrumentation - modules with dedicated vacuum equipment - …

Type 3Type 1

Type 2 Type 4


13

Two-beam Module configurations


•Configuration #1 the accelerating structures are formed by four high-speed milled bars which are then clamped together, and the PETS bars and couplers are all clamped and housed in a vacuum tank alternative

BASELINE

•Configuration #2 the ACS are made of discs all brazed together forming a sealed structure, and the PETS are made of octants and “mini-tanks” around the bars adopted as baseline


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Two-beam module, TYPE 1

Technical system design is not an isolated activity boundary conditions shall be defined together with other systems and module integration

Syst

em in

tegr

atio

n

A. S

amos

hkin



15

Accelerating structures


Acc. structure (CLIC G, D: 140 mm) Structure (brazed disks) with

“compact” coupler [fabrication: superstructures x2]

Wakefield monitor (1 per AS) Cooling circuits Vacuum system Interconnection to MB Q Structure support (alignment) Output waveguide with RF

components (eg. loads)

WFM

SUPPORT

VAC ION PUMP

SPACE RESERVED FOR VAC SYSTEM

WAVEGUIDE TO AS

COOLING TUBE

LOAD

CMF

SPLITTER

A S


16

PETS


PETS (CLIC note 764) Structure (8 octants) with

“compact” couplers Minitank for structure On-off mechanism (20

msec OFF, 20 sec ON) Cooling circuits (size

for 0.5% beam loss) RF distribution to AS Vacuum system Interconnection to BPM Minitank support

(fiducialisation)

MINI-TANK

SUPPORT COOLING TUBE

ON-OFF MECHANISM

SPACE RESERVED FOR VACUUM SYSTEM

WAVEGUIDE TO AS

PETS - BPM INTERCONNECTION


17

Some requirements


Accelerating structure pre-alignment transverse tolerance 14 um at 1s (shape accuracy for acc. structures: 5 um)

PETS pre-alignment transverse tolerance 30 um at 1s (shape accuracy for PETS: 15 um)

Main beam quadrupole: Pre-alignment transverse tolerance 17 um at 1s Stabilization (values at 1s):

1 nm > 1 Hz in vertical direction 5 nm > 1 Hz in horizontal direction

Module power dissipation : 7.7 kW (average) (~ 600 W per ac. structure)

Vacuum requirement: 10-8 mbar

D. Sch

ulte

W. W

uens

ch,

H. Mai

naud

-Dur

and

N. Gaz

is, R

.

Nousia

inen

K. A

rtoos

,

H. Mai

naud

-Dur

and

H. Sch

mick

ler

R. N

ousia

inen

C. Gar

ion

EDMS#

971

908

EDMS#

971

672

EDMS#

992

778

EDMS#

964

715/

17


18

A. And

erss

on

Some requirements


L. S

oby

M. M

oden

a

Ph. L

ebru

n

EDM

S# 1

0004

81Limited space for BPM integration: 60 to 100 mm 1 BPM per Q, 1 WFM per AS,(RMS position error 5 μm)DB: ~ 47000 devices; MB: ~151000 devices

MB: The magnets are needed in four different magnetic lengths, namely 0.35, 0.85, 1.35 and 1.85m. In the baseline design, the beam pipe is attached to the magnet. The beam pipe centre needs to be aligned to the magnetic centre of the quadrupole with an accuracy of better than 30 μm.

EDM

S# 9

5408

1DB: The quadrupole active length is specified to 0.15 m. total number of quadrupoles needed for both decelerators is about 42000.

EDM

S# 9

9279

0

Beam/RF instrumentation

Magnets

Major cost driver : ~ 35 % of total cost

DB


19

Tunnel integration


Clear interconnection plane requirement is being included in module integration design work space for inter-girder connection: 30 mm

Power dissipation and temperature stability constraints directly influence the sizing of cooling and ventilation systems

Transport and installation have to be considered in the early stage of the design

Study in collaboration with CES WG

Module design has a strong impact on tunnel dimensions

K. K

ersh

aw

M. N

onis,

J. Osb

orne


20

Milestones


Module review now Baseline for CDR

CLIC workshop (oct 2009): recommendations from the module review will be reported together with the action plan

Module baseline design: Q1 2010

Test modules in the lab: 2010 – 2011 [includes FP7 activities]:

Test modules in CLEX 2011-2013


Two-beam module review , 15-16 September 2009 Module layout and types

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