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Published byNicholas Shandy
Modified over 2 years ago
RFQ Structural Mods Scott Lawrie
Vacuum Pump Flange Vacuum Flange Coolant Manifold Cooling Pockets Milled Into Vanes Potentially Bolted Together Tuner & Coupler Ports Vanes
Increased Pumping Area Original design: Twelve 12mm wide slots Pumping area = 7045 mm 2 Modified design: Four 25mm wide slots Pumping area = 9749 mm 2 (43% greater)
Simulation Bodies 25mm 12mm Section of pump’s debris-catching grill Inter-vane vacuum Bulk quadrant vacuum Pumping slot vacuum
Magnetic Field Results B-field plot path
≈1W total heat ≈10mW total heat Turbo-pump grill position B-field along plot path
Because B-field is not uniform, neither is heat load. Therefore 1W is an over-estimate, but let’s not push it! Magnetic Field Across Grill Assume 1mm pitch, square wire grill
Frequency varies with RFQ length Mode Frequency / MHz Resonant Frequency: Superfish
Present geometry Q = 12463 Shunt Impedance = 2830 MΩ/m Power/Quadrant/cm = 186 W
Increased quadrant radius to bring on tune Q = 12749 Shunt Impedance = 3022 MΩ/m Power/Quadrant/cm = 174 W
Reduced quadrant radius but increased vane width Q = 11504 Shunt Impedance = 2308 MΩ/m Power/Quadrant/cm = 228 W
20mm wide vanes allow: 1.More material, so greater thermal conductivity and strength 2.Easier to machine straight edges 3.More room for cooling pocket penetration toward vane tip
RFQ Thermal Analysis Scott Lawrie. Vacuum Pump Flange Vacuum Flange Coolant Manifold Cooling Pockets Milled Into Vanes Potentially Bolted Together Tuner.
Fine-Tuning the RFQ End Region. “…The Devil is in the Detail” RFQ bulk design very close to completion But before drafting need to check: Repeatability.
RFQ End Flange Dipole Tuner Finger Cooling. Basis of Study Need multi-purpose end flange –Adjustable dipole mode suppression fingers –Beam current transformer.
2.1GHz cavity without cell-to-cell coupling slots – 1.875” beam pipe Binping Xiao Aug
F.E.T.S. RFQ Mechanical Design by Peter Savage 7 th January 2010.
RFQ Matcher. What am I doing this time?! Concerned that modulations and matcher affect field flatness and frequency These are very small features How.
CFD Simulations of a Novel “Squirt-Nozzle and Water Bath” Cooling System for the RFQ.
The Front End Test Stand Collaboration ELECTROMAGNETIC DESIGN OF A RFQ FOR THE FRONT END TEST STAND AT RAL A. Kurup, A. Letchford The RAL front end test.
RFQ development for high power beams
Modifications Required on Model Before Meshing & Solving Slice up to define mesh in different areas –Transversely separate vane-tip region (about 16x16mm.
EMMA Cavity Update Emma Wooldridge 27/02/07. Requirements Initial Design Cavity Options & Optimisation Available Designs Future Work.
Design of Standing-Wave Accelerator Structure
Effect of RFQ Modulations on Frequency and Field Flatness
704 MHz cavity design based on 704MHZ_v7.stp C. Pai
A. Lambert: Thermal and Mechanical Analysis PXIE RFQ Design Review, Berkeley, CA April 12, 2012 Thermal and Mechanical Analysis of the PXIE RFQ Andrew.
Replies to Spanish RFQ Questions (slides re-used from previous talks)
2.1 GHz Warm RF Cavity for LEReC Binping Xiao Collider-Accelerator Department, BNL June 15, 2015 LEReC Warm Cavity Review Meeting June 15, 2015.
Engineering of the power prototype of the ESRF HOM damped cavity* V. Serrière, J. Jacob, A. Triantafyllou, A.K. Bandyopadhyay, L. Goirand, B. Ogier * This.
EXAMPLE 27.1: A copper wire carries a current of 10 A. It has a cross- sectional area of 0.05 cm 2. Estimate the drift velocity of the electrons.
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