LINAC 4 Emittance Meter.

LINAC 4 Emittance Meter

LINAC 4 Beam Instrumentation Review - 18-19 October 2011
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 D. GERARD BE/BI/ML LINAC 4 Beam Instrumentation Review October 2011

SLIT SLIT 0.1 mm Stainless steel plate: thickness 1 mm with 0.2 mm at the slit position D. GERARD BE/BI/ML LINAC 4 Beam Instrumentation Review October 2011

SEM-GRID 48 wires 40 µm Tungsten space 0.75 mm D. GERARD BE/BI/ML LINAC 4 Beam Instrumentation Review October 2011

SEM-GRID D. GERARD BE/BI/ML LINAC 4 Beam Instrumentation Review October 2011

SEM-GRID Polarized plate D. GERARD BE/BI/ML LINAC 4 Beam Instrumentation Review October 2011

SEM-GRID Angle setting D. GERARD BE/BI/ML LINAC 4 Beam Instrumentation Review October 2011

Measurement plate (F.C.)
D. GERARD BE/BI/ML LINAC 4 Beam Instrumentation Review October 2011

Emittance Meter D. GERARD BE/BI/ML LINAC 4 Beam Instrumentation Review October 2011

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 2011

New Slit -Thermo-Mechanical Calculations (EN-MME)
ANSYS Model Temperature Evolution during multi-shots Without Cooling With Cooling Design Completed Fabrication Launched D. GERARD BE/BI/ML LINAC 4 Beam Instrumentation Review October 2011

Specification 3 MeV 12 Mev H- range in Carbon [mm] 0.1 1 Min/Max Slit thickness 2/5 Min single blade width 67 Min single blade height Min slit fullstroke 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 2011

NEW SLIT D. GERARD BE/BI/ML LINAC 4 Beam Instrumentation Review October 2011

NEW SLIT Graphite plate BEAM direction 15° Slit: 0.1 mm or 0.2 mm D. GERARD BE/BI/ML LINAC 4 Beam Instrumentation Review October 2011

NEW SLIT wedge to adjust by machining after metrology measurement D. GERARD BE/BI/ML LINAC 4 Beam Instrumentation Review October 2011

NEW SLIT 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 LINAC 4 Beam Instrumentation Review October 2011

NEW SLIT The back copper support of the graphite plate integrate the cooling circuit hole D. GERARD BE/BI/ML LINAC 4 Beam Instrumentation Review October 2011

NEW SLIT 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 LINAC 4 Beam Instrumentation Review October 2011

NEW SLIT Fixation of the graphite plate on the support Thickness at the slit position : 1 mm D. GERARD BE/BI/ML LINAC 4 Beam Instrumentation Review October 2011

NEW SLIT Horizontal et vertical slit D. GERARD BE/BI/ML LINAC 4 Beam Instrumentation Review October 2011

NEW SLIT Stepping motor: 200 step / turn Horizontal et vertical slit movement with potentiometer Manipulator 1.27 mm/turn => resolution 6.35 µm / motor step Sliding support Window for laser profile measurement D. GERARD BE/BI/ML LINAC 4 Beam Instrumentation Review October 2011

NEW SLIT Slope setting with the back micrometric screw 0.25 mm/ turn Tilt setting with the 2 front screw Potentiometer will be added to the micrometric screw to be able to keep the position of the alignment setting BEAM D. GERARD BE/BI/ML LINAC 4 Beam Instrumentation Review October 2011

TILT setting 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. Several iteration by acting on the 2 micrometric screws until getting the slit horizontal Horizontal ref (or vertical) of the optical system D. GERARD BE/BI/ML LINAC 4 Beam Instrumentation Review October 2011

Slope setting Setting the position of the slit by action on the back screw Laser beam sensor LASER BEAM Vertical movement of the laser Mechanism under vacuum Several iteration until getting the maximum value at the laser beam sensor D. GERARD BE/BI/ML LINAC 4 Beam Instrumentation Review October 2011

Budget new slit Design: kCHF Manufacturing: kCHF (88 kCHF + 60 KCHF) Total: ~250 kCHF D. GERARD BE/BI/ML LINAC 4 Beam Instrumentation Review October 2011

Some pictures D. GERARD BE/BI/ML LINAC 4 Beam Instrumentation Review October 2011

GEFRAN PKM175 Répétitivité : 0.01 mm D. GERARD BE/BI/ML LINAC 4 Beam Instrumentation Review October 2011

D. GERARD BE/BI/ML LINAC 4 Beam Instrumentation Review October 2011

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 D. GERARD BE/BI/ML LINAC 4 Beam Instrumentation Review October 2011

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: Slope alignment of the 2 slits (not usual, probably with laser and captor): Check of the alignment and survey alignment 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 D. GERARD BE/BI/ML LINAC 4 Beam Instrumentation Review October 2011

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 !!! D. GERARD BE/BI/ML LINAC 4 Beam Instrumentation Review October 2011

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 2011

Question? Thank for your attention Question? D. GERARD BE/BI/ML LINAC 4 Beam Instrumentation Review October 2011

Cut view D. GERARD BE/BI/ML LINAC 4 Beam Instrumentation Review October 2011

LINAC 4 Emittance Meter.

Similar presentations

Presentation on theme: "LINAC 4 Emittance Meter."— Presentation transcript:

Similar presentations

About project

Feedback

Log in

Auth with social network:

LINAC 4 Emittance Meter.

Similar presentations

Presentation on theme: "LINAC 4 Emittance Meter."— Presentation transcript:

Similar presentations

About project

Feedback