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CLIC requirements on Warm Magnets (for CLIC Modules mainly)

M. Modena, CERN TE-MSC

13 April 2011 CERN-UK Collaboration Kick-off Meeting

2CERN-UK Kick-off Meeting: M. Modena, CERN TE-MSC

CLIC “Two-Beams” Module Layout

13 April 2011

Standard Module8374 per Linac

Module Type 2634 per Linac

Module Type 3477 per Linac

Module Type 4731 per Linac

CLIC Module Type1154 per Linac

CLIC at 500 GeV : 4248 modulesCLIC at 3 TeV : 20924 modules…(+ some special modules not yet fully defined)…

3CERN-UK Kick-off Meeting: M. Modena, CERN TE-MSC13 April 2011

Prototype modules in LAB [4 Modules]

Prototype modules in CLEX [3(+1?) Modules]

Demonstration of the two-beam module designThis implies the assembly and integration of all components and technical systems, such as RF, magnet, vacuum, alignment and stabilization, in the very compact 2-m long two-beam module

Demonstration of the two-beam acceleration with two-beam modules in CLEXAddress other feasibility issues in an integrated approach.Industrialization and mass production studies

Test Program 2010-2013

LAB Test Program

4CERN-UK Kick-off Meeting: M. Modena, CERN TE-MSC13 April 2011

Test Program 2010-2013

CLEX Test Program

5CERN-UK Kick-off Meeting: M. Modena, CERN TE-MSC13 April 2011

DBQ: Available space very limited (also due to increase of magnetic performance requirements (integrated gradient) along the years (without space increase!). The max active length is now 194 mm. Very wide range of nominal operating gradients along the decelerator: 62.8 -6.3 T/m.The total number of DBQ required for both linacs is ~ 42000

Quadrupoles for the CLIC “Two-Beams” Modules: Drive Beam Quads

EM Design: Call for Tender going out for 6-9 units.

6CERN-UK Kick-off Meeting: M. Modena, CERN TE-MSC13 April 2011

Quadrupoles for the CLIC “Two-Beams” Modules: Drive Beam Quads

CLIC DB Quadrupole Parameters Units

MAGNET Magnet size H×S×L [mm×mm×mm] 390×390×286Magnet mass [kg] 149.2Full aperture [mm] 26Good field region(GFR) diameter

[mm] 11×2=22

YOKEYoke size H×S×L [mm×mm×mm] 390×390×180Yoke mass [kg] 29.4×4=117.6

COILHollow Conductor size [mm] 6×6, Ø=3.5

Number of turns per coil 52

Total conductor mass [kg] 31.6

Operation mode10% of nominal Nominal 120% of nominal

Effective length [mm] 194.7 194 192.5Gradient at Z=0 [T/m] 6.26 62.78 75.85Integrated gradient ∫Gdl [T] 1.218 12.18 14.6

Integrated gradient quality in GFR

% 0.04 0.01 0.02

Electrical parameters

Ampere turns per pole [A] 432 4840 9100

Current [A] 8.3 93 175Current density [A/mm2] 0.3 3.6 6.8Total resistance [mOhm] 99 99 99Total inductance [mH] 40 40 40Voltage [V] 0.82 9.2 17.3Power [kW] 0.007 0.86 3.03

COOLING Air (natural convection)

Water Water

Cooling circuits per magnet

4 4

coolant velocity [m/s] 1.1 1.9cooling flow per circuit [l/min] 0.6 1.1

Pressure drop [bar] 2.2 5.7Reynolds number 4122 8210Temperature rise [K] 5 10

7CERN-UK Kick-off Meeting: M. Modena, CERN TE-MSC13 April 2011

Mock-up for LAB Test Program:Pieces for 5 units are at CERN.

ALTERNATIVE PM design (by Cockcroft; see next presentation of J.Clarke):Design is going-on and is close to completion. Prototypes procurement will then follow.

Quadrupoles for the CLIC “Two-Beams” Modules: Mock-ups (for Lab Tests) and ALTERNATIVE DBQ design (by Cockcroft)

8CERN-UK Kick-off Meeting: M. Modena, CERN TE-MSC13 April 2011

CLEX Test Program

The design and procurement of two prototypes (High and Low Gradient) based on TUNABLE PERMANENT MAGNET technology is the scope of the WP2 of the CERN-UK Coll. Agreement (KE1789/TE). The Low Grad. Prototype design will be compatible with CLIC Module layout in order to be eventually tested in CLEX.

Quadrupoles for the CLIC “Two-Beams” Modules: ALTERNATIVE design (by Cockcroft)

9CERN-UK Kick-off Meeting: M. Modena, CERN TE-MSC13 April 2011

MBQ: Beam pipe is supported by the magnet and must be aligned to the magnetic centre of the Quad with an accuracy better than 30 m; μtransverse tolerance for pre-alignment 17 µm at 1σ; stabilization: 1 nm >1Hz in vertical & 5 nm >1Hz in horizontal direction at 1σ. The total number of MBQ required for both linacs is ~ 4000.

Quadrupoles for the CLIC “Two-Beams” Modules: Main Beam Quads(magnet aperture: 10 mm; Nominal Gradient: 200 T/m; 4 different lenghts)

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-MBQ independent steering correctors (the solution with added correcting coils in the quadrupole seems to not guarantee an adequate field quality for both the quadrupole and dipole corrections).- Analysis on the BPM acquisition/processing/etc. times leads to a settling time for the corrector of: 2 ms.-The most realistic operation mode (and the one less impacting on stability!) should be with a relative small correction between pulses; it was estimated ≤ ± 25% of the full “nominal” correction range between sequential pulses; (“nominal” correction range: 4, 3, 2, 1 mTm for Type4,3,2,1 MBQ).-These values recently discussed (11 March 11) will be now taken to finalize the steering correctors design in full transient operation mode. Prototypes (Type1 and 4 ) will then follow.

13 April 2011

MBQ steering dipole correctors:

CERN-UK Kick-off Meeting: M. Modena, CERN TE-MSC

11CERN-UK Kick-off Meeting: M. Modena, CERN TE-MSC13 April 2011

During the WP Definition, we identify with J.Clarke as other possible subject of collaboration : ”Studies on mass production techniques and cost effective manufacturing methods”.

We were thinking of course to:- DBQ production (~40000 u.),but these studies could also be applied to:- MBQ production (~4000 u.)- Steering correctors production (idem)

Since program shorted to 3-years duration, this activity item is not officially there.

Possible development of collaboration with Cockcroft on CLIC Magnets studies

12CERN-UK Kick-off Meeting: M. Modena, CERN TE-MSC13 April 2011

…looking at the CERN-UK Collaboration WPs, other “interactions” would be probably on RTML and BDS integration studies since we are deeply involved in the “CLIC Magnet Catalogue” where all of the magnets of the CLIC complex are analyzed in term of: overall design, main manufacturing and operational parameters, expected costs. This work is well advanced and the majority of the CLIC magnet system is already analyzed and assessed.

13CERN-UK Kick-off Meeting: M. Modena, CERN TE-MSC

…about CLIC Magnet Catalogue…

13 April 2011

14CERN-UK Kick-off Meeting: M. Modena, CERN TE-MSC

…about CLIC Magnet Catalogue…

13 April 2011

…Thanks for the attention…