1. A. FaccoEURISOL DS Task 7GANIL, 30 Nov 2005 EURISOL DS 2° Meeting Task 7 - Primary Accelerator GANIL, November 30, 2005 Summary of the Task 7 status New configurations under discussion: Multi-user option scheme Required choppers and deflectors Beam type Accelerator types Preliminary planning until January 31, 2006 Preliminary planning February 1, 2006 - January 31, 2007

2. A. FaccoEURISOL DS Task 7GANIL, 30 Nov 2005 Task 7 first 9 months: actions Planning of the 1st year and work breakdown per sub-task and per participant-contributor. Beginning of the work on sub-tasks. Participation to the 1st meeting of Task 2,3,4 at CERN to acquire specifications for the primary linac (A. Facco). 1st meeting of Task 7 (and task 8) at LNL, March 05. Participation (A. Facco) to the “High Power Superconducting Linac Workshop 2005” at Northern Illinois University, May 22-24. Oral invited presentation entitled “EURISOL”.

3. A. FaccoEURISOL DS Task 7GANIL, 30 Nov 2005 Participant number 1) 162 Participant short name 2) INFNCEACNRS/IN2P3 Total Person-months 3) 180.231.820.3 ** Deliverab le/ ** Deliverable/Milestone Name ** Workpacka ge ** Lead ** Plan ned Achieved Milestone No/Subtask NoContractor(s)(in mon ths) M3.1Preliminary Layout and beam dynamics 0-100 MeV section INFN99 First 9 months No deliverable planned in the first 9 months, only 2 milestones. 1 achieved 9 months delay foreseen for milestone “Proton source and LEBT tests measurement”.

4. A. FaccoEURISOL DS Task 7GANIL, 30 Nov 2005 Subtasks first 9 months : groups activity INFN group –preliminary design of a 100 MeV proton linac based on 352 MHz coaxial HWRs and Ladder cavities for protons –preliminary design of a 100 MeV proton and deuteron linac based on 88 MHz superconducting RFQs, QWRs and coaxial HWRs –preparation work for the test at LNL of the INFN proton source and LEBT. –preliminary multi-mode scheme for multiple users SOREQ group –preliminary design of a 5 mA, 100 MeV proton and deuteron linac, based on 176 MHz RFQ and 176 and 352 MHz superconducting HWRs. TRIUMF group –calculations of realistic field distributions for 352 MHz coaxial HWRs to be used in beam dynamics simulations. IPNO group –study of a 100 MeV proton linac based on Spoke cavities. CEA group –development of a procedure for designing linac lattices with minimum beam losses and minimum emittance increase.

5. A. FaccoEURISOL DS Task 7GANIL, 30 Nov 2005 Topics: linac and beam types Work in linac design and beam dynamics simulations mainly performed in the first section (0  100 MeV) of the linac. final specifications of Tasks 2,3 and 4 for the driver accelerator beams not yet frozen possibility of deuteron and higher A/q acceleration, in addition to the baseline 1 GeV, 5mA proton beam still open In order to satisfy any possible choice of primary beam once the decision will be taken, we must compare three different linac schemes for the first 40 MeV: –352 MHz Rfq and coaxial Half-wave or Spoke resonators (or Ladder from 5 to 20 MeV); suitable for proton beams only; –176 MHz Rfq and coaxial Half-wave resonators (suitable for p,d); –88 MHz Rfq (normal or superconducting) and quarter-wave resonators (suitable for p,d and possibly for A/q>2). For the 40  100 MeV section, either coaxial HWR or Spoke cavities are foreseen. All these schemes are compatible with a chopping system; however, the chopper beam dump must be located below ~3 MeV to avoid nuclear reactions. Thus scheme 1) requires significant modifications of the 5 MeV proton Rfq, downgraded to 3 MeV, and introduction of an additional ~2 MeV DTL section after the chopper. The possibility of chopping the beam is required for multi-user operation

6. A. FaccoEURISOL DS Task 7GANIL, 30 Nov 2005 Topics: multi-user option We have also proposed the option of a multi-user scheme for the primary beam, accomplished by diverting the beam at high energy to up to 4 extraction lines, to feed 4 different RIB production targets at the same time. RIB sources, although designed for cw beam, can tolerate pulsed beam with pulsing frequency of at least 50 Hz, and pulse length of at least 1 ms. A suitable scheme is under study, able to provide 1.7 (3.4) MW to the high power RIB target and 100 (200) kW to the 3 direct targets at the same time. This requires a quasi-cw, 2 (4) mA beam with short slots (~1  s) of beam chopped at low energy, providing macropulses at 50 Hz containing one long pulse of 17 ms and 3 short ones of 1 ms. During the zero current slots, the 1 GeV beam can be switched, without beam losses, between different lines by means of a fast magnetic dipole A low energy chopping system is required in this case.

7. A. FaccoEURISOL DS Task 7GANIL, 30 Nov 2005 Multi-mode operation (proposed scheme) Beam chopper (duty cycle ~100 %) Fast deflector at 1 GeV Multi-mode operation with 1 GeV protons serving 4 different lines: –long pulses (for a total current ~ 3.4 mA) to the 4 MW target station –short pulses (for a total current of 200 μA) to the 200 kW target stations p,d rfq chopper 2-gap SC linac 1 GeV Fast deflector intermediate energy extraction <3 MeV/A To RIB sources RIB sources require beam pulses at  50 Hz and  1 ms

8. A. FaccoEURISOL DS Task 7GANIL, 30 Nov 2005 Beam time structure 17 ms 1.7(3.4) MW 1 ms - 100(200) kW The slots can be made several (up to 100)  s long, without significant loss of duty cycle moderate risetime requirements for the high energy deflector SNS- (or SPL-, or ESS-) type chopper more than adequate LEBT chopper only should be sufficient zero current slots

9. A. FaccoEURISOL DS Task 7GANIL, 30 Nov 2005 Questions on multi-mode H- and HE stripping alternative what HE deflector what chopper Source pulsing?(space charge transient to be studied)

10. A. FaccoEURISOL DS Task 7GANIL, 30 Nov 2005 Planning to Jan 30,2006 At the end of the first year, the baseline beam parameters (p, d, energy,…) must be frozen. –Completion of the preliminary studies on different schemes (without chopping system) –start of the detailed study of the chopping system –analysis of the results and decision of the baseline design (beams, frequencies,…) –first baseline beam parameters at 80 (100) MeV as input for the high energy section calculations

11. A. FaccoEURISOL DS Task 7GANIL, 30 Nov 2005 Planning year 2

12. A. FaccoEURISOL DS Task 7GANIL, 30 Nov 2005 jan 2006-jan 2007 Milestones Milestone NoMilestone NameSubtaskLead ContractorPlannedExpected months M1Proton source and LEBT testsProton source, RFQINFN17 M1.1Test measurement514 M1.2Intermediate design12 M1.3Complete design17 M2RFQ and MEBTProton source, RFQINFN M2.1Test measurements1726 M3Low and medium v/c linac0-100 MeV sectionINFN, SOREQ, TRIUMF,IPNO 24 M3.2Intermediate layout and beam dynamics M7Beam loss calculationINFN, CEA, SOREQ M7.1Preliminary calculations24

13. A. FaccoEURISOL DS Task 7GANIL, 30 Nov 2005 Preliminary planning to Jan 30,2007 In the second year the choice of the linac scheme will be made, and an intermediate layout of the first 100 MeV section, with beam dynamics calculations, will be produced –Intermediate design of the baseline 100 MeV section without chopper (INFN- LNL, SOREQ, TRIUMF, IPNO). Intermediate design of the chopping system (if the multi-user option will be chosen) –LEBT chopper –(Mebt chopper) –integration in the baseline design –Delivery of 100 MeV beam parameters to CEA –Design of the 0.1-1 GeV section (CEA) –Preliminary study of the HE deflector (CEA) (if the multi-user option will be chosen) –preliminary beam loss estimation in the linac (INFN, CEA, SOREQ). –Completion of the proton source and LEBT baseline design, including test measurements (INFN-LNL).

14. A. FaccoEURISOL DS Task 7GANIL, 30 Nov 2005

15. A. FaccoEURISOL DS Task 7GANIL, 30 Nov 2005