S. Mathot – LINAC 4 BCC – 18/2/2010 1 S. Mathot Work performed by : Pierre Bourquin, André...

STATUS OF THE LINAC 4 RFQ CONSTRUCTION

S. Mathot – LINAC 4 BCC – 18/2/2010 1

S. Mathot

Work performed by : Pierre Bourquin, André Briswalter, Thierry Callamand, Jacky Carosone, Ahmed Cherif, Christophe Delorme, A. France, Nadine Favre, Jean-Marie Geisser, Alessandra Lombardi, Vincent Maire, Marina Malabaila, Fabrice Multon, O. Piquet, Dominique Pugnat, Carlo Rossi, Philippe Richerot, Benoit Riffaud, Marc Timmins, Agostino Vacca, G. Vandoni.

OUTLINE


1) Some pictures

2) Previous experiences in RFQ assembly

3) Linac 4 RFQ design and manufacture procedure

4) Results obtained with the test piece

5) Actual situation

6) Actual schedule

2) PREVIOUS EXPERIENCES


TRASCO

6 modules brazed at CERN, Horizontal and Vertical configurations.Movements observed for n° 1, 2 and 6.RF ok.



IPHI

1 module repaired and 2 brazed at CERN, Horizontal and Vertical configurations.Movements observed after brazing and after heat treatment of machined electrodes.



IPHI

Module # 5, bottom electrode after heat treatment at 800 °C: movements up to 0.08 mm.



IFMIF

18 Modules (up to 2012), Horizontal and Vertical configurations

3) LINAC 4 RFQ DESIGN AND MANUFACTURE PROCEDURE


→ Internal shape optimized for the horizontal brazing step.

→ Electrode width constant.

→ Pumping port brazed.

3) LINAC 4 RFQ DESIGN AND MANUFACTURE PROCEDURE


1. First Rough Machining (Over-thickness : ~ 3 mm) (L Lf + 6 mm, TR2 : L = Lf + 6 mm)

2. Rough Machining (Over-thickness : ~ 1 mm) (L = Lf + 2 mm)

1° Thermal Treatment

3. Partial Finishing (Over-thickness : 0 and 0.15* mm) (L = Lf + 1 mm)

Internal and external surfaces, excepted the brazing surfaces* and the modulation*.

2° Thermal Treatment

4. Finishing (L = Lf + 0.5 mm)

Brazing surface and Modulation

5. 1° Brazing (Horizontal)

6. Re-machining (L = Lf + 0.2 mm)

7. 2 ° Brazing (Vertical)

8. Final machining (L = Lf)

4) RESULTS OBTAINED WITH THE TEST PIECE


X+

Z+

Y+

(0,-300,0)

(144,-300,0)

(-97,-300,0)

(-144,-300,0)

One major electrode build to test the manufacture procedure.First concern is the geometrical stability after thermal treatments.



Heat treatments at 800 °C (brazing simulation)

on the test piece after final machining.

Before Treat.(28 mm)*

After 1° Treat.(65 mm)*

* Measured Planarity

After 2° Treat.(60 mm)*



Observations:

Previous stabilisations at 600 °C are not

completely efficient.

A thermal treatment (brazing) at 800 °C

stabilises correctly the major electrode.

The treatment itself includes no

significant movements.

To be demonstrate by re-

machining this stabilised electrode

(Finishing) and after a new treatment at

800 °C



Heat treatments at 800 °C (brazing

simulation) on the test piece after an

additional final machining (Finishing).

Before Treat.(15 mm)*

After Treat.(28 mm)*

* Measured Planarity



Observations:

No significant movement after a

treatment (brazing) at 800 °C on a

correctly stabilized electrode.

The procedure :

Rough Machining

1° Thermal Treatment : 600 °C

Partial Finishing

2° Thermal Treatment : 800

°C

Finishing

is validated for the first module .....

5) ACTUAL SITUATION


Suivi Pôles RFQ LINAC 4Situation 17/02/2010

Pôle Ebauche Cleaning 3 D Before 1° Treat. 3D After Semi- Finition Cleaning 3 D Before 2° Treat. 3 D After Finition 3 D Final Décapage

Pôle de Test √ √ √ R √ √ R √ √ √ R √ √ R √ √ R √

Pôle Majeur HAUT TR 1 (1H) √ √ √ R √ √ R √ √ √ R √ √ R √ en cours

Pôle Majeur BAS TR 1 (1B) √ √ √ R √ √ R √ √ √ R √ √ R √ √

Pôle mineur DROIT TR 1 (1D) √ √ √ R √ √ R √ √ √ R √ √ R

Pôle mineur GAUCHE TR 1 (1G) √ √ √ R √ √ R √ √ √ R √

Pôle Majeur HAUT TR 3 (3G) √ √ √ R en cours

Pôle Majeur BAS TR 3 (3B) √ √ √ R

Pôle mineur DROIT TR 3 (3D) √

Pôle mineur GAUCHE TR 3 (3G) √

Pôle Majeur HAUT TR 2 (2H) √

Pôle Majeur BAS TR 2 (2B) √

Pôle mineur DROIT TR 2 (2D) √

Pôle mineur GAUCHE TR 2 (2G) √

R = Rapport de métrologie fait

5) ACTUAL SITUATION


Module 1, Top electrode

Partial Finishing :

Measure of the brazing surfaces before

and after heat treatment at 800 °C.

5) ACTUAL SITUATION


Module 1, Bottom electrode

Partial Finishing :

Measure of the brazing surfaces before

and after heat treatment at 800 °C.

5) ACTUAL SITUATION


Module 1, Bottom electrode, Partial Finishing

From D. Pugnat, EDMS 1055637

5) ACTUAL SITUATION


Module 1, Top electrode, Partial FinishingFrom D. Pugnat, EDMS 1054644

5) ACTUAL SITUATION


Module 1, Bottom electrode, Finishing

From D. Pugnat

Maxi = +0.054Mini = -0.017

+0.054

-0.014

+0.010

-0.010

0 200 400 600 800 1000-0.03

-0.02

-0.01

-2.77555756156289E-17

0.00999999999999997

0.02

0.03

Beam Axis (mm)

Mea

sure

d - M

odel

(mm

)

5) ACTUAL SITUATION

S. Mathot – LINAC 4 BCC – 18/2/2010 22Module 1, Bottom electrode, Finishing

5) ACTUAL SITUATION


Module 1, Bottom electrode, Finishing From D. Pugnat

après optimisation de la modulation sans nez

+0.012-0.021

-0.037

+0.023

-0.021-0.018

-0.035

-0.019

-0.030

+0.027

-0.024

-0.043

5) ACTUAL SCHEDULE


2010 2011

Mars Avril Mai Juin Juillet Aout Sept. Octobre Nov. Déc. Janvier

T1 Fin. 1°

Bras.

2° Bras.

T2 S/F Pôles Maj.S/F P. min.

Finition 1°

Bras.

2° Bras.

T3 S/F Pôles Maj.S/F P. min.

Finition 1°

Bras.

2° Bras.

S. Mathot – LINAC 4 BCC – 18/2/2010 1 S. Mathot Work performed by : Pierre Bourquin, André...

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