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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
S. Mathot – LINAC 4 BCC – 18/2/2010 2
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
S. Mathot – LINAC 4 BCC – 18/2/2010 3
S. Mathot – LINAC 4 BCC – 18/2/2010 4
2) PREVIOUS EXPERIENCES
S. Mathot – LINAC 4 BCC – 18/2/2010 5
TRASCO
6 modules brazed at CERN, Horizontal and Vertical configurations.Movements observed for n° 1, 2 and 6.RF ok.
2) PREVIOUS EXPERIENCES
S. Mathot – LINAC 4 BCC – 18/2/2010 6
IPHI
1 module repaired and 2 brazed at CERN, Horizontal and Vertical configurations.Movements observed after brazing and after heat treatment of machined electrodes.
2) PREVIOUS EXPERIENCES
S. Mathot – LINAC 4 BCC – 18/2/2010 7
IPHI
Module # 5, bottom electrode after heat treatment at 800 °C: movements up to 0.08 mm.
2) PREVIOUS EXPERIENCES
S. Mathot – LINAC 4 BCC – 18/2/2010 8
IFMIF
18 Modules (up to 2012), Horizontal and Vertical configurations
3) LINAC 4 RFQ DESIGN AND MANUFACTURE PROCEDURE
S. Mathot – LINAC 4 BCC – 18/2/2010 9
→ Internal shape optimized for the horizontal brazing step.
→ Electrode width constant.
→ Pumping port brazed.
3) LINAC 4 RFQ DESIGN AND MANUFACTURE PROCEDURE
S. Mathot – LINAC 4 BCC – 18/2/2010 10
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
S. Mathot – LINAC 4 BCC – 18/2/2010 11
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.
4) RESULTS OBTAINED WITH THE TEST PIECE
S. Mathot – LINAC 4 BCC – 18/2/2010 12
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)*
4) RESULTS OBTAINED WITH THE TEST PIECE
S. Mathot – LINAC 4 BCC – 18/2/2010 13
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
4) RESULTS OBTAINED WITH THE TEST PIECE
S. Mathot – LINAC 4 BCC – 18/2/2010 14
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
4) RESULTS OBTAINED WITH THE TEST PIECE
S. Mathot – LINAC 4 BCC – 18/2/2010 15
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
S. Mathot – LINAC 4 BCC – 18/2/2010 16
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
S. Mathot – LINAC 4 BCC – 18/2/2010 17
Module 1, Top electrode
Partial Finishing :
Measure of the brazing surfaces before
and after heat treatment at 800 °C.
5) ACTUAL SITUATION
S. Mathot – LINAC 4 BCC – 18/2/2010 18
Module 1, Bottom electrode
Partial Finishing :
Measure of the brazing surfaces before
and after heat treatment at 800 °C.
5) ACTUAL SITUATION
S. Mathot – LINAC 4 BCC – 18/2/2010 19
Module 1, Bottom electrode, Partial Finishing
From D. Pugnat, EDMS 1055637
5) ACTUAL SITUATION
S. Mathot – LINAC 4 BCC – 18/2/2010 20
Module 1, Top electrode, Partial FinishingFrom D. Pugnat, EDMS 1054644
5) ACTUAL SITUATION
S. Mathot – LINAC 4 BCC – 18/2/2010 21
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
S. Mathot – LINAC 4 BCC – 18/2/2010 23
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
S. Mathot – LINAC 4 BCC – 18/2/2010 24
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.
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