1. Joint CERN-Pakistan Committee, obrunner, 11 April 2013 LEP Copper Cavities for Islamabad University

2. In its first phase of operation, the LEP RF system consisted of 128 accelerating cavities (1989 – 1995) Joint CERN-Pakistan Committee, obrunner, 11 April 2013

3. CERN season's greetings (2000) Joint CERN-Pakistan Committee, obrunner, 11 April 2013

4. Upper part: storage cavity Lower part with five accelerating cells The EM power continuously oscillates between the two sets of cavities Between the bunch passages the RF energy is stored in the low-loss storage cavity => This allows a reduction of RF power requirements of 35% Wolfgang Schnell (1929 - 2006) Joint CERN-Pakistan Committee, obrunner, 11 April 2013 (from LEP Design report)

5. Joint CERN-Pakistan Committee, obrunner, 11 April 2013 (from LEP Design report) This requires a mixing scheme for the drive frequencies of the coupled-cavity system (to simultaneously excite the zero and Π mode resonances of the coupled cavity system)

6. CountryContactPurposeNb of cavitiesNb of Spheres Univ. of IslamabadPakistanH. HooraniRF Training5 (fully equipped) 0 INFNITL. PerialeDark matter exp.22 Science Museum of LondonUKE. SandersExhibition11 UK Institute of Physics (IOP)UKB. BenatiExhibition11 Univ. of EdinburghUKR. VenessExhibition11 Joint CERN-Pakistan Committee, obrunner, 11 April 2013 We do have enough cavities to fulfil all present requests The 5 cavities for Islamabad are: In “good shape” and free release candidates (DGS/RP) Equipped with RF tuners 4/5 are equipped with RF couplers (one spare coupler will be provided) Equipped with RF pick-ups The cavities are NOT equipped with vacuum flanges, nor with pumps or vacuum gaskets (there is NO vacuum equipment available) The necessary ”inter-modules”, on which the vacuum equipment were installed, have been evacuated during LEP dismantling The cavities are NOT equipped with control systems, nor RF power sources or waveguide transitions (see next slide)

7. Joint CERN-Pakistan Committee, obrunner, 11 April 2013 Don’t hesitate to contact J. Jacob (ESRF) or P. Marchand (Soleil) for information, drawings, etc

8. Joint CERN-Pakistan Committee, obrunner, 11 April 2013

10. The list of requests has been presented to Steve for approval The 5 “best” cavities have been identified and selected The shipment of the material will be organized as soon as CERN gets the green light from the Swiss Authorities (expected in May) Shipment procedure to be established Note: advantageous to declare material as “a long term loan” instead of “a donation” to simplify administrative procedures and reduce the costs (possible with Pakistan?)

11. Joint CERN-Pakistan Committee, obrunner, 11 April 2013