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LINAC 4 Emittance Meter. Linac 4 Emittance Meter 1er design for commissioning of the source Slit Sem-grid Measurement plate (F.C.) Emittance meter Upgrade.

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Presentation on theme: "LINAC 4 Emittance Meter. Linac 4 Emittance Meter 1er design for commissioning of the source Slit Sem-grid Measurement plate (F.C.) Emittance meter Upgrade."— Presentation transcript:

1 LINAC 4 Emittance Meter

2 Linac 4 Emittance Meter 1er design for commissioning of the source Slit Sem-grid Measurement plate (F.C.) Emittance meter Upgrade of the slit for 3Mev New slit LINAC 4 Beam Instrumentation Review October 20112D. GERARD BE/BI/ML

3 SLIT LINAC 4 Beam Instrumentation Review October D. GERARD BE/BI/ML SLIT 0.1 mm Stainless steel plate: thickness 1 mm with 0.2 mm at the slit position

4 LINAC 4 Beam Instrumentation Review October D. GERARD BE/BI/ML SEM-GRID 48 wires 40 µm Tungsten space 0.75 mm

5 LINAC 4 Beam Instrumentation Review October D. GERARD BE/BI/ML SEM-GRID

6 LINAC 4 Beam Instrumentation Review October D. GERARD BE/BI/ML SEM-GRID

7 LINAC 4 Beam Instrumentation Review October D. GERARD BE/BI/ML SEM-GRID Polarized plate

8 LINAC 4 Beam Instrumentation Review October D. GERARD BE/BI/ML SEM-GRID Angle setting

9 LINAC 4 Beam Instrumentation Review October D. GERARD BE/BI/ML Measurement plate (F.C.)

10 LINAC 4 Beam Instrumentation Review October D. GERARD BE/BI/ML Measurement plate (F.C.)

11 LINAC 4 Beam Instrumentation Review October D. GERARD BE/BI/ML Measurement plate (F.C.)

12 Emittance Meter LINAC 4 Beam Instrumentation Review October D. GERARD BE/BI/ML

13 Emittance Meter LINAC 4 Beam Instrumentation Review October D. GERARD BE/BI/ML

14 Emittance Meter LINAC 4 Beam Instrumentation Review October D. GERARD BE/BI/ML

15 Emittance Meter LINAC 4 Beam Instrumentation Review October D. GERARD BE/BI/ML

16 Emittance Meter LINAC 4 Beam Instrumentation Review October D. GERARD BE/BI/ML

17 New Slit Design Slit used at source front-end would reach too high temperatures at 3 MeV and would not be thick enough at 12 MeV New slit design based on – Energy deposition: dilute energy deposition density by putting the blade with an angle w.r.t. beam axis – Minimize scattering along slit gap: minimize slit thickness New design based on graphite plates with an angle of 15 degrees w.r.t. beam trajectory D. GERARD BE/BI/ML LINAC 4 Beam Instrumentation Review October

18 New Slit -Thermo-Mechanical Calculations (EN-MME) D. GERARD BE/BI/ML LINAC 4 Beam Instrumentation Review October ANSYS Model Temperature Evolution during multi-shots Without Cooling With Cooling Design Completed Fabrication Launched

19 Specification 3 MeV12 Mev H- range in Carbon [mm] 0.11 Min/Max Slit thickness [mm] 2/5 Min single blade width [mm] 67 Min single blade height [mm] 67 Min slit fullstroke [mm] 134 Blade distance (slit gap) all along the slit thickness [µm] 100, adjustable to 200 D. GERARD BE/BI/ML LINAC 4 Beam Instrumentation Review October

20 NEW SLIT LINAC 4 Beam Instrumentation Review October D. GERARD BE/BI/ML

21 LINAC 4 Beam Instrumentation Review October Graphite plate BEAM direction 15 ° D. GERARD BE/BI/ML NEW SLIT Slit: 0.1 mm or 0.2 mm

22 LINAC 4 Beam Instrumentation Review October wedge to adjust by machining after metrology measurement D. GERARD BE/BI/ML NEW SLIT

23 LINAC 4 Beam Instrumentation Review October Additional graphite plates needed to cover the whole beam during the measurement Five set of plates are ordered (3 spares) D. GERARD BE/BI/ML NEW SLIT

24 LINAC 4 Beam Instrumentation Review October The back copper support of the graphite plate integrate the cooling circuit hole D. GERARD BE/BI/ML NEW SLIT

25 LINAC 4 Beam Instrumentation Review October Two side plate close the cooling circuit. In the assembly, it is the only position where a brazing separate vacuum from the water of the cooling circuit D. GERARD BE/BI/ML NEW SLIT

26 LINAC 4 Beam Instrumentation Review October Fixation of the graphite plate on the support D. GERARD BE/BI/ML NEW SLIT Thickness at the slit position : 1 mm

27 LINAC 4 Beam Instrumentation Review October D. GERARD BE/BI/ML NEW SLIT

28 LINAC 4 Beam Instrumentation Review October Horizontal et vertical slit D. GERARD BE/BI/ML

29 NEW SLIT LINAC 4 Beam Instrumentation Review October Horizontal et vertical slit movement with potentiometer Window for laser profile measurement Sliding support D. GERARD BE/BI/ML Stepping motor: 200 step / turn Manipulator 1.27 mm/turn => resolution 6.35 µm / motor step

30 NEW SLIT LINAC 4 Beam Instrumentation Review October Slope setting with the back micrometric screw Tilt setting with the 2 front screw D. GERARD BE/BI/ML 0.25 mm/ turn BEAM Potentiometer will be added to the micrometric screw to be able to keep the position of the alignment setting

31 TILT setting D. GERARD BE/BI/ML LINAC 4 Beam Instrumentation Review October Is done with a optical bench The slit assembly is installed in the tank The tank is aligned to a optical bench (the survey target and the tilt reference plate are set). The assembly will be under vacuum. By acting on the 2 front micrometric screw the slit will be aligned For the slope setting the assembly will stay on the same bench and under vacuum but a laser will replace the optical system. Horizontal ref (or vertical) of the optical system Several iteration by acting on the 2 micrometric screws until getting the slit horizontal

32 Slope setting D. GERARD BE/BI/ML LINAC 4 Beam Instrumentation Review October LASER BEAM Laser beam sensor Vertical movement of the laser Mechanism under vacuum Several iteration until getting the maximum value at the laser beam sensor Setting the position of the slit by action on the back screw

33 NEW SLIT LINAC 4 Beam Instrumentation Review October D. GERARD BE/BI/ML

34 NEW SLIT LINAC 4 Beam Instrumentation Review October D. GERARD BE/BI/ML

35 Budget new slit Design: 93 kCHF Manufacturing: 150 kCHF (88 kCHF + 60 KCHF) Total:~250 kCHF D. GERARD BE/BI/ML LINAC 4 Beam Instrumentation Review October

36 D. GERARD BE/BI/ML LINAC 4 Beam Instrumentation Review October Some pictures

37 D. GERARD BE/BI/ML LINAC 4 Beam Instrumentation Review October GEFRAN PKM175 Répétitivité : 0.01 mm

38 D. GERARD BE/BI/ML LINAC 4 Beam Instrumentation Review October

39 D. GERARD BE/BI/ML LINAC 4 Beam Instrumentation Review October

40 Planning AP : delivery of the mechanical part earliest end of November. The supply parts are already at CERN except water flow, screw... Planning (working days):see next slide LINAC 4 Beam Instrumentation Review October D. GERARD BE/BI/ML

41 Planning 1. Assembly of the graphite plate, metrology lab, machining of the wedge, cleaning, reassembly and remetrology lab: 7 days 2. Assembly of the 2 slit out of the tank: 10 working days 3. Assembly of the tank with the setting support on the optical alignement bench and alignment: 3 working days 4. Assembly of the 2 slits inside the tank: 2 working days 5. Tilt alignment of the 2 slits: 2 working days Slope alignment of the 2 slits (not usual, probably with laser and captor): 3 working days Check of the alignment and survey alignment 2 working days Mechanical assembly finish: 29 working days But the position setting and check of the movement for the soft and hardware electronic needed to be done with the slit assembly on the optical alignment bench and with the support of the ML section LINAC 4 Beam Instrumentation Review October D. GERARD BE/BI/ML

42 LINAC 4 Beam Instrumentation Review October Planning If the delivery from the AP (Main Workshop) is end-of November 25/01/2012 the new slit will be ready (mechanical) BUT in parallel the Winter Shut Down !!!

43 Thanks to: F. Roncarolo, B. Cheymol B. Riffaud, E. Berthome, D. Steyaert, A. Dallochio G. Favre, S. Mathot M. Duraffourg, G. J. Focker....and all other people involved in this project D. GERARD BE/BI/ML LINAC 4 Beam Instrumentation Review October

44 Question? Thank for your attention Question? D. GERARD BE/BI/ML LINAC 4 Beam Instrumentation Review October

45 Cut view LINAC 4 Beam Instrumentation Review October D. GERARD BE/BI/ML


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