Two-beam module review, 15-16 September 2009
Module layout and types
G. Riddone for the CMWG, 15.09.2009
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
G. Riddone, TBM review, 15/09/2009
6
CLIC two-module WG mandate
G. Riddone, TBM review, 15/09/2009
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”
G. Riddone, TBM review, 15/09/2009
Test Modules
8
Organization
G. Riddone, TBM review, 15/09/2009
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
G. Riddone, TBM review, 15/09/2009
Beam physics
Civil engineerin
g and service
Machine protection
and operation
Cost and schedule
Stabilisation WG
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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
G. Riddone, TBM review, 15/09/2009
RF and beam dynamics constraints
Definition of technical
requirements
11
Module types and numbers
G. Riddone, TBM review, 15/09/2009
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
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Module types and numbers
G. Riddone, TBM review, 15/09/2009
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
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Two-beam Module configurations
G. Riddone, TBM review, 15/09/2009
•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
G. Riddone, TBM review, 15/09/2009
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Accelerating structures
G. Riddone, TBM review, 15/09/2009
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
G. Riddone, TBM review, 15/09/2009
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
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Some requirements
G. Riddone, TBM review, 15/09/2009
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
G. Riddone, TBM review, 15/09/2009
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
G. Riddone, TBM review, 15/09/2009
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
G. Riddone, TBM review, 15/09/2009
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