INFN Mi HIPPI Activities Status

+ = INFN Mi – HIPPI Activities Status: october 2008 Nicola Panzeri Paolo With contributions from S. Barbanotti, L. Monaco, P. Pierini HIPPI Sezione di Milano LASA

Status • Task List: 29 -31 October – HIPPI 08 meeting – – Task 3. 1. 1 Cavity A Vertical tests – COMPLETED on 2004 Task 3. 1. 2 Tuner Design – COMPLETED on 2005 Task 3. 1. 3 Integration of piezo design – COMPLETED on 2005 Task 3. 1. 4 Tuner construction and testing – Construction and test of tuner at room temperature completed • Integration cavity – helium tank now in progress – – Misalignment check Magnetic shield design, procurement and test Welding procedure Cavity integration order (Zanon) Author: Nicola Panzeri --- INFN Milano - LASA 2

Cavity Helium Tank assembly test 29 -31 October – HIPPI 08 meeting • Defined final integration strategy to close the gaps between tank main body and ring and cavity end plates before sealing pass Author: Nicola Panzeri --- INFN Milano - LASA 3

Magnetic shield 29 -31 October – HIPPI 08 meeting • Proposed external solution is impossible because there is no space between the tuner and the helium tank • Last year we explored a possible internal solution, now we have the magnetic shield in house EXTERNAL MAG. SHIELD INTERNAL MAG. SHIELD Author: Nicola Panzeri --- INFN Milano - LASA 4

Magnetic shield Internal shield design fixed Shields arrived at LASA Shield successfully pre-assembled to verify design Set of measurements to verify shielding capability and compare with Poisson simulations 29 -31 October – HIPPI 08 meeting • • Author: Nicola Panzeri --- INFN Milano - LASA 5

Magnetic shield (Internal) • Influence on surface resistance from the average field seen on the cavity RF surface Rmag [n. Ohm] = 3 * B [m. T] ( f [GHz] )0. 5 29 -31 October – HIPPI 08 meeting • Rsurf = RBCS + Rres + Rmag • GOAL: Rmag < 5 m. T => Q ~ 1010 Author: Nicola Panzeri --- INFN Milano - LASA 6

Magnetic shield (Internal) We studied the efficiency of the internal shield using 2 D code (Poisson). We considered a 1 mm thick Cryoperm shield and two different permeability values 29 -31 October – HIPPI 08 meeting BEARTH = 42 m. T Author: Nicola Panzeri --- INFN Milano - LASA 7

Magnetic shield (Internal) 29 -31 October – HIPPI 08 meeting Experimental data Author: Nicola Panzeri --- INFN Milano - LASA 8

Magnetic shield (Internal) Results 29 -31 October – HIPPI 08 meeting Lower than goal = 5 m. T Author: Nicola Panzeri --- INFN Milano - LASA 9

29 -31 October – HIPPI 08 meeting Integration and welding procedure Author: Nicola Panzeri --- INFN Milano - LASA 10

29 -31 October – HIPPI 08 meeting Integration and welding procedure EB weld n. 1 Author: Nicola Panzeri --- INFN Milano - LASA 11

29 -31 October – HIPPI 08 meeting Integration and welding procedure EB weld n. 2 Author: Nicola Panzeri --- INFN Milano - LASA 12

29 -31 October – HIPPI 08 meeting Integration and welding procedure TIG weld Author: Nicola Panzeri --- INFN Milano - LASA 13

Integration and welding procedure 29 -31 October – HIPPI 08 meeting START Author: Nicola Panzeri --- INFN Milano - LASA 14

Conclusions/Scheduling 29 -31 October – HIPPI 08 meeting • Cavity, Helium tank, Magnetic shield, Tuner, Driving system are ready. • Integration of cavity into the helium tank already ordered • After integration the cavity will be shipped to Saclay for chemical treatment, HPR and test Author: Nicola Panzeri --- INFN Milano - LASA 15