ESR Slow highly charged ions and antiprotons

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Presentation transcript:

CRYRING @ ESR Slow highly charged ions and antiprotons Motivation Technical Overview Status of installation Frank Herfurth for the HITRAP and CRYRING working groups

F. Herfurth "CRYRING @ ESR" WHY? HCI Highly Charged Ions Elements Isotopes + Matter Charge radii FS, HFS g-factor e--binding + surface BW effect a, me Lamb-shift Structures QED test + atoms Hollow atoms Charge exchange Collision dynamics F. Herfurth "CRYRING @ ESR"

F. Herfurth "CRYRING@ESR" FAIR F. Herfurth "CRYRING@ESR"

F. Herfurth "CRYRING@ESR" FAIR – SPARC and FLAIR Atomic physics Antiproton physics (low energy) FLAIR SPARC F. Herfurth "CRYRING@ESR"

SPARC and FLAIR Facility for Low Energy Antiproton and Ion Research Stored Particles Atomic Physics Research Collaboration Swedish in-kind contribution CRYRING F. Herfurth "CRYRING@ESR"

The “Green Paper” – Stepwise to FAIR Module 0 SIS100 SIS 100 Module 1 Exp. Areas CBM/ HADES, APPA Module 2 Super-FRS ESR But: ESR continues! Module 3 Antiprotons for PANDA (CR, HESR) HESR Upgrade CR F. Herfurth "CRYRING @ ESR"

F. Herfurth "CRYRING @ ESR" GSI SIS 400 MeV/u CRYRING @ ESR FRS 11 MeV/u ESR UNILAC 4 MeV/u F. Herfurth "CRYRING @ ESR"

CRYRING in Stockholm (MSL) Successful operated from 1992 to 2010 Dismantled and shipped to FAIR/GSI in 2012/13 F. Herfurth "CRYRING @ ESR"

F. Herfurth "CRYRING @ ESR" Max. rigidity 1.44 Tm 15 MeV/u U92+ 96 MeV/u protons Min. rigidity ~ 0.054 Tm 150 keV/u protons Experiment Equipment Particle detectors Gas jet, MOTReMi, EXL ... Extraction Injection Particle detectors 0° port Microcalorimeter 180° port Microcalorimeter Electron cooler F. Herfurth "CRYRING @ ESR"

F. Herfurth "CRYRING @ ESR" Vacuum & Beam Life Time Ion pumps ~ 10 Cryopumps NEG pumps ~ 100 0.3 15 3 s 15 min V. Shevelko, priv. comm. F. Herfurth "CRYRING @ ESR"

Electron Cooling ESR - CRYRING C. Brandau priv. comm. F. Herfurth "CRYRING @ ESR"

F. Herfurth "CRYRING @ ESR" (p,g) Reaction Rates Nucleosynthesis of proton-rich nuclei beyond iron Only few experimental data for relevant energy range (Gamow window) in p-process 12 F. Herfurth "CRYRING @ ESR"

Experimental Equipment Schottky beam diagnostics Electron cooler / electron-ion merged beam experiments Atomic targets (gas target, MOTReMi) Transverse electron targets Particle, X-Ray photon, recoil ion detectors Cryogenic current comparator Beam line for slow extraction F. Herfurth "CRYRING @ ESR"

F. Herfurth "CRYRING @ ESR" Max. rigidity 1.44 Tm 15 MeV/u U92+ 96 MeV/u protons Min. rigidity ~ 0.054 Tm 150 keV/u protons FAIR Research & Development Detectors and diagnostic systems FAIR type control system Training of operators on FAIR type system FAIR type safety and radiation monitoring/access system All this with real beam! Scientific Opportunities Heavy, highly-charged ions as available at GSI (up to U92+) at low energy ~ 100 keV/u .. 10 MeV/u – bridge the energy gap between the ESR (> 4 MeV/u) and HITRAP (<10 keV/u) F. Herfurth "CRYRING @ ESR"

F. Herfurth "CRYRING @ ESR" ESR – From 400 to 4 MeV/u ESR – Experimental Storage Ring at GSI with stochastic and electron cooling Ni28+ 400  30  4 MeV/u ESR cycle during recent experiment signal: time (s) RF amplitude 5..20 injection, stoch. cooling 3..10 deceleration 400 – 30 MeV/u 2..6 e- cooling, rebunching 2..5 deceleration 30 – 4 MeV/u magn.dipole field 2..5 e- cooling, ejection 2  107 3 reset magnets ion current 40 s 1100 A  180 A  25 A F. Herfurth "CRYRING @ ESR"

Modification of ESR for CRYRING Additional Kicker but in the mean time … S. Litvinov

Extraction towards CRYRING Beam extracted using the injection kicker Transported beyond the first three dipoles in transfer line N7+ @ 4 MeV/u (only ca. 0.6 Tm !) S. Litvinov, C. Kleffner, M. Steck, F. Nolden, D. Winters

Modification of ESR for CRYRING Additional Kicker in the mean time … creative use of existing kicker Beam line upgrade (ESR – Cave B) added steering, dipoles; additional diagnostics Synchronization ESR/CRYRING Kickers/RF got easier by increasing the diameter of CRYRING to ESR/2 Towards a reduced cycle time Requires faster cooling and more flexible control system

CRYRING modifications toward FAIR/GSI Injection ≤ 30 MeV/u ≤ 30 MeV/n CRYRING is now being modified to be suitable for its new role as LSR. A high-energy injection and extraction will be added. Injection kicker magnet Extraction kicker magnet Electrostatic extraction septum Magnetic extraction septum Extraction

F. Herfurth "CRYRING @ ESR" New Injection Septum Delivered to GSI Tested up to 1800 Ampere Stray field measured F. Herfurth "CRYRING @ ESR"

Component Preparation/Repair Magnets Add supports Transfer measurements to prepare alignment Check cooling water flow Electron Cooler Repair transport damage Check collector Prepare cryogenic test Others Magnetic field measurements Adapt to safety rules Check heating jackets Test diagnostics (IPM, Trafos) … F. Herfurth "CRYRING @ ESR"

CRYRING @ ESR in “Cave B” New, 1.44 Tm Beam Line Modify Cave B F. Herfurth "CRYRING @ ESR"

F. Herfurth "CRYRING @ ESR" Cave Reconstruction FOPI Magnet moved out and detector uninstalled Major concrete and infrastructural changes implemented F. Herfurth "CRYRING @ ESR"

F. Herfurth "CRYRING @ ESR" Installation started! F. Herfurth "CRYRING @ ESR"

F. Herfurth "CRYRING @ ESR" Timeline Installation started Continue Installation Finish cave infrastructure, Install Power Converters Control system and Diagnostics on track Beam line ESR – CRYRING prepared F. Herfurth "CRYRING @ ESR"

Slow, Heavy, Highly Charged Ions @ GSI/FAIR SIS Stripper 400 MeV/u UNILAC FRS ESR 4 MeV/u HITRAP 4 K 10 MeV/u CRYRING 4 MeV/u … 100 keV/u Slow, heavy, highly charged Ions … mostly stored but always well controlled Energy range between 10 MeV/nucleon to sub eV/Ion 105 to 107 heavy, highly charged ions like U91+ Low energy antiprotons in the future S-EBIT F. Herfurth "CRYRING @ ESR"

Slow Antiprotons @ GSI/FAIR 29 GeV/u ? GeV/u p-Linac ? SIS100 Pbar Target ESR Slow, heavy, highly charged Ions … mostly stored but always well controlled Energy range between 10 MeV/nucleon to sub eV/Ion 105 to 107 heavy, highly charged ions like U91+ Low energy antiprotons in the future 4 K 4 MeV/u HITRAP S-EBIT 4 MeV/u … 100 keV/u 10 MeV/u CRYRING Beam lines connecting HESR, CR, ESR under discussion F. Herfurth "CRYRING @ ESR"