1. Peter Spiller, DIRAC Kick-off meeting Peter Spiller Design Study Group DIRAC kick-off meeting 13.4.2005 SIS100

2. Peter Spiller, DIRAC Kick-off meeting SIS100 in FAIR

3. Peter Spiller, DIRAC Kick-off meeting SIS 100 Project Overview Accel. TDR (all device developments finished) Device TRs R&D phase Construction phase Importance of the year 2008 ! Demonstration of the U28+ operation in SIS18 bevor series production of SIS100

4. Peter Spiller, DIRAC Kick-off meeting TR Estimates - R&D Phase SIS100 Total Investments [M€] Est. Personnel Involvement [FTE Est. Personnel Involvement [M€] Investment /Personnel [M€/FTE] Investment + Personnel [M€] EU Total expected [M€] EU Requested Budget [M€] System Planning0.6820.252 Magnets3.405 --3.405 + x1.70.733 Power Supplies0.045.80.4870.0070.527 RF Systems4.48844.73.7550.18.2431.260.63 Injection/Extraction0.373.50.2940.10.664 Beam Diagnostics3.2642.73.5860.0766.8461.1410.272 Vacuum System3.0550.84.2670.067.3170.6970.191 Insertions0.0510.20.8570.0050.907 Cryogenics0.595322.6880.0183.283 Safety and Machine Protection 0.0754.50.3780.0170.453 Total15.33319416.30.04831.35.482.078

5. Peter Spiller, DIRAC Kick-off meeting UHV: ERDA Measurements GSI, TU Darmstadt, LMU Rf1: Longitudinal feed back system GSI, CERN Rf2: Fast high power switches for rf gaps GSI, CERN System Design: High current beam dynamics studies GSI, TU Darmstadt, LBNL, BNL, Uni Bologna Beam Diagnostics: Digital signal analysis electronics for BPMs GSI, CERN, TU Darnstadt, Company Itech, FZJ Magnets: Fast ramped super conducting magnets GSI, Company BNN, JINR, Company ACCEL SIS100 : Subtasks and Participants

6. Peter Spiller, DIRAC Kick-off meeting Pb 55+ Pb 54+ X  loss ≈ 10 4 -10 5 !!!  loss 10 9 Pb 54+ (4.2 MeV/u) Pb 53+ stripping losses (U 28+ :SIS100) capture losses (dominate in SIS18/LEAR) pressure bumps Pb 54+ beam loss induced desorption yield: stripping capture Dipole magnet  <1 o ERDA - Advanced Materials and Coatings R&D goal : Materials for Accelerator Components and Structures e.g. Collimators, with Low Desorption Coefficient Beam Losses caused by vacuum instability

7. Peter Spiller, DIRAC Kick-off meeting Rf Gap Switch – Minimization of Cavity Impedances R&D goal : Development of a high power Rf gap switch for inductivily loaded cavities with a low impedance, for high image currents SIS100 Rf Systems: Number of Acceleration Cavities : 30 + 15 Number of Bunch Compression Cavities : 25 Preliminary parameters of a semi-conductor rf gap switch switching time  1  s max applied voltage20 kV max current50 A impedance  5 W Only the Rf system required is visible for the beam Options : MOSFET, IGBT, High Tc Superconducter

8. Peter Spiller, DIRAC Kick-off meeting Damping of coupled bunch oscillations induced by unwanted higher order modes. Longitudinal feedback system consists of a dedicated RF kicker, which applies an energy correction, an electromagnetic kick, to a passing bunch. Damping of longitudinal oscillations around the synchrotron phase. To damp all the dipole mode oscillations, the kick force must change it‘s phase from a passing bunch to the next bunch. Thus half the bunch frequency is nessesary for the bandwidth of a longitudinal feedback kicker. Complex interaction during high current operation with broad band MA loaded cavity impedance Longitudinal Feed Back System R&D Goal : Prototype longitudinal feedback system for damping of higher order mode bunch oscillations

9. Peter Spiller, DIRAC Kick-off meeting High Current Beam Dynamics  Transverse Beam Dynamics : Nonlinear Lattice Properties under Space Charge Influence  Collective Instabilities and Impedances : Definition of Impedance Budget („Impedance Acceptance“) Analysis and Optimization of Device Impedances  Longitudinal Beam Dynamics : Simulation of high intensity beams including interaction with realistic properties (e.g. impedance) of Rf systems Definition of optimized Rf manipulations for single bunch generation and compression Franchetti et.al

10. Peter Spiller, DIRAC Kick-off meeting Digital Signal Analysis Electronics for BPMs Transition from analoge (different dedicated systems) to a digital (single), fully programmable BPM electronics for e.g. a) high resolution beam position measurement (large beam fill factor) on the ms scale and b) broad-band, turn-by-turn position measurement Tests of the new electronics hardware in CERN PS R&D goal : 4-channel 250 MS/s 12Bit analogue board with sufficient memory and a set of high performance algorithms implemented on the digital board

11. Peter Spiller, DIRAC Kick-off meeting Fast Ramped Superconducting Magnets Nuclotron Cable Nuclotron Dipole in Cryostat Reduction of AC losses during ramping by improved iron yoke design 40 W/m > 13 W/m B max = 2 T, dB/dt= 4T/s, f= 1 Hz Window frame magnet with superconducting coil R&D goal: Mechanical and Structural R&D – New Coil Layout – Prototypes for Dipoles and Quadrupoles