Superconducting RF Crab Cavities

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Presentation transcript:

Superconducting RF Crab Cavities Marco Garlaschè – CERN EN/MME On behalf of the Crab Cavities Team HiLumi LHC Goes To Industry Workshop CERN, Geneva, Switzerland – 26 June, 2015

Crab Cavities: Why? Currently in LHC, at a given experiment… …the AIM… Collision Point 26/06/2015 2φ …the AIM… to increase the number of collisions between the two LHC beams by reducing the crossing angle φ HiLumi 2 Industries - Garlaschè

Superconducting Radio-Frequency Cavities, a.k.a. CRAB Cavities Crab Cavities: Why? 26/06/2015 …the ANSWER… Superconducting Radio-Frequency Cavities, a.k.a. CRAB Cavities HiLumi 2 Industries - Garlaschè

Crab Cavities: Where & When? LHC Point 1 Modules to be installed on each IP side & beam LHC Point 5 SPS Test (before LS2) 2x Prototype Modules SM18 Area (~2016) Initial testing: CRAB cavities, clean room & handling facilities.. 26/06/2015 HiLumi 2 Industries - Garlaschè

Crab Cavities: What? 300 K > T > 80 K 80 K > T > 2 K 2 K …a Module is… Cryostat embedding 2x CRAB cavities auxiliary systems 300 K > T > 80 K 26/06/2015 80 K > T > 2 K 2 K 2 K BEAM HiLumi 2 Industries - Garlaschè

Bottom-Up View: Cavities RFD Cavity DQW Cavity 900 mm 26/06/2015 2x designs! Highly non-axialsymmetrical Niobium cavities 650 mm Technologies Involved: Forming of 3÷4mm-thick Niobium sheets non axisymm. shapes, high aspect ratios, profile tolerance ~ 0.5mm EB-welding (strict requirements …): Nb/Nb & Nb/NbTi Brazing (or other) of Nb to S.Steel Interest for Suppliers Needed Not Needed Much Welcome HiLumi 2 Industries - Garlaschè

Manufacturing R&D with companies SPL Project forming & welding of Cu  Nb CRABS Initial tests qualification of forming and RF 26/06/2015 Nb/SS CERN CERN HiLumi 2 Industries - Garlaschè

HOMs & FPCs1 Input/Output systems for power management inside cavities Cu Al2O3 620 mm 200 mm Nb SS Coaxial line 26/06/2015 Input/Output systems for power management inside cavities Technologies Involved: Mix turning + milling + assembly of Cu and Nb parts (assembly profile ~0.3mm) Brazing of vacuum-air interfaces embedding Ceramic + Cu + S.Steel 1 High Order Mode Dampers, Fundamental Power Couplers HiLumi 2 Industries - Garlaschè

Magnetic Shieldings & He Vessel TSHIELD= 80K÷300K TSHIELD= 2K 26/06/2015 Helium Vessel: Machining (Titanium Gr.2) Assembly + Titanium TIG welding Supply of Titanium bellows 900 mm Magnetic Shielding alloy: Forming + assembly Annealing treatment Supply of raw Material (Nb, NbTi, Magn. Shielding, St. Steel, Titanium) HiLumi 2 Industries - Garlaschè

Cryostat Manufacturing of Cryostat and Auxiliary systems 1700 mm Sheet metal working of tank (precision interfaces) Cryo Line (welds tight at 2K) Ti/S.Steel direct transitions (also @ 2K) SS Bellows and vacuum equip. Thermal shielding with Helium cooling + MLI … 1700 mm 26/06/2015 2900 mm HiLumi 2 Industries - Garlaschè

Electronics and Power supplies Courtesy E. Montesinos 26/06/2015 SPS Test Series HiLumi 2 Industries - Garlaschè

Passive/active Tuning System Not Forgetting… Passive/active Tuning System (ref. Kurt Artoos) FSI1 Alignment System (ref. Mateusz Sosin) Actuation 26/06/2015 1 Frequency Scanning Interferometry HiLumi 2 Industries - Garlaschè

Not Forgetting… Active Alignment @ SPS Test: motorized & remotely-controlled supporting systems 26/06/2015 HiLumi 2 Industries - Garlaschè

Accelerating Science and Innovation Thank you for your attention! Accelerating Science and Innovation 14