Possibility of bringing TRI P to HIE-ISOLDE a Dual magnetic Spectrometer reconsidered Olof TENGBLAD ISCC 16th February 2015 (Previous: ISCC 22nd Oct 2013 and HIE-ISOLDE 1st April 2014 ) Zero-degree Hie-Isolde Workshop in LUND March 2011 where it was expressed a strong interest for having a Zero- degree spectrometer coupled to HIE-ISOLDE. The initiative was postpone due to the rapid advance of the TSR project and two such projects on the same time was too much Zero-degree Hie-Isolde What would an ideal zero-degree device achieve? identification of reaction products physical separation of reaction products beam physical separation of reaction products fusion-evaporation physical separation of isobaric beams or other beam contaminants Design goals large enough angular acceptance to pick up sequential decay products excellent angular resolution to allow kinematic reconstruction missing momentum INCIDENT BEAM (d,t) forward of 45 (d,d) just forward of 90 (d,p) from 180 to forward of 80 transfer products on neutron-rich side can sequentially n-decay USING RADIOACTIVE BEAMS in INVERSE KINEMATICS isobaric beams can be identified and/or physically separated (possibly further stripped, e.g. 15 N 3+ / 21 O 4+ ) Knock-on carbons from CD 2 targets fusion-evaporation products from reactions on C in CD 2 targets WHY a Zero-degree spectrometer Wilton Catford University of Surrey, UK 24 Ne(d,p ) N=16 replaces broken N=20 W.N. Catford et al., Eur. Phys. J. A25, Suppl. 1, 245 (2005). Schematic of the TIARA setup. A beam of 10 5 pps of 24 Ne at 10.5A MeV was provided from SPIRAL, limited to 8 mm.mrad to give a beam spot size of mm. The target was 1.0 mg/cm 2 of (CD 2 ) n plastic. The TIARA array covered 90% of 4 with active silicon. EXPERIMENT TO STUDY 25 Ne d 3/2 26 Ne(d,p) 27 Ne 26 Ne(d,p) 27 Ne 26 Ne+n ZERO DEGREE = SPECTROMETER ZERO DEGREE = SCINTILLATOR RESULTS from TIARA/MUST2 Nov2007RESULTS from SHARC Aug2009 Energy v Theta with trifoil 26 Na g.s. 26 Na ex. states (d,d) (p,p) 25 Na(d,p) 26 Na 5 A.MeV Wilton Catford University of Surrey, UK Demands from experiments for a spectrometer at HIE-ISOLDE Thorsten Krll (TU Darmstadt) Work supported by BMBF (Nr. 06 DA 9036I) and LOEWE / HIC for FAIR IS591 P377 IS591 P377 18N: a challenge to the shell model and a part of the to r-process element production in Type II supernovae Matta, A / Catford, WWe plan to employ a device such as the Trifoil detector in the beam at zero degrees, beyond the target chamber. Immediately in front of the trifoil, the use of an appropriate thickness of aluminium, typically a few tens of micrometers, allows the products from compound nuclear reactions to be stopped, and lets the beam and transfer reaction products pass. IS587 P398 Characterising excited states in and around the semi- magic nucleus\n 68 Ni using Coulomb excitation and one-neutron transfer Gaffney, L./Flavigny, F./Zielinska, M./Kolos, K.P398 IS566 P370 Probing intruder configurations in 186,188Pb using Coulomb excitation Pakarinen, J..P370 IS562 P362 Transfer Reactions and Multiple Coulomb Excitation in the 100Sn Region Cederkll, J. IS561 P361 Transfer reactions at the neutron dripline with triton target Riisager, K. / Mcher, D. IS556 P352 Spectroscopy of low-lying single-particle states in 81Zn populated in the 80Zn(d,p) reaction Orlandi, R. / Raabe, R. IS555 P351 Study of shell evolution in the Ni isotopes via one- neutron transfer reaction in 70Ni Valiente Dobon, J. / Orlandi, R. / Mengoni, D. CLEAN UP CONTAMINANTS in beam IS554 P350 Search for higher excited states of 8Be* to study the cosmological 7Li problem Gupta, D. IS553 P348 Determination of the B(E3,0+->3-) strength in the Scheck, M. / Joss, D. IS551 P345 Coulomb excitation of doubly magic 132Sn with MINIBALL at HIE-ISOLDE Reiter, P. IS549 P343 Coulomb Excitation of Neutron-rich 134;136Sn isotopes Krll, T. / Simpson, G. IS548 P342 Evolution of quadrupole and octupole collectivity north- east of 132Sn: the even Te and Xe isotopes Krll, T. / Simpson, G. IS547 P340 Coulomb excitation of the two proton-hole nucleus 206Hg Podolyak, Z. IS546 P339 Study of the effect of shell stabilization of the collective isovector valence-shell excitations along the N=80 isotonic chain Bauer, C. / Pietralla, N. / Rainovski, G. Already approved HIE-ISOLDE experiments that could profit from a Spectrometer 35 LoIs for HIE-ISOLDE had been submitted by nov claimed that they will profit from spectrometer or separator Mostly to identify beam-like particles Only 1 explicitely mentions the use of a spectrometer (reactions with light particles) 12 of these LoIs request the MINIBALL + CD or T-REX set-up Today 14 approved proposals that could profit from a Spectrometer 9 Coulomb excitation Energy: about MeV/u Intensities: > 10 2 /s 10 8 /s Large range of scattering angles event-by-event identification not possible (if not a small acceptance of a spectrometer may be sufficient) A and Z determination of scattered particles Spectrometer/separator used to determine - Beam composition for normalisation - Integral measurement sufficient Transfer reactions with light targets Energy: MeV/u Intensities: > 10 5 /s Small scattering angles around 0 Event-by-event PID - Identification of heavy transfer product - Reactions of beam contaminants - Fusion-evaration reactions with target / carrier (CH 2, CD 2, Ti+ 3 H, 9,10 Be, X+ 3 He, X+ 4 He, X+ 16 O, ) Also needed for analysis: - Beam composition for normalisation - Integral measurement sufficient Beam identification Devices / methods E-E: Si-IC telescope, small Bragg chamber in beam dump Laser ON/OFF Decay spectroscopy at target postion / beam dump Release curve gating (hardware / analysis) Isomer catcher (Ni transfer run) ??? New devices / methods under development Fusion veto (preliminary test performed) Large area Bragg detector status??? RDT with CD detector Physics cases 10 TRI an existing Spectrometer & Presently not in use The radioactive nuclei produced using beams from the superconducting cyclotron AGOR. The high energy radioactive beam is transformed to a low-energy High quality bunched beam by the combined fragment and recoil-separator. Original KVI August 1999 This is not too old equipment. Original proposal for funding in August 1999, to build a Microlaboratorie for fundamental Physics at KVI using Trapped radioactive Isotopes 2001 Start building 2005 ready for Beam 4.6 M project, where the Recoil separatar was 1.7 M. 1.7 M Separator Van Swinderen Institute for Particle Physics and Gravity University of GroningenResearchgroup Ions:The group is at Univ. Groningen not associated with KVI-CAR The group is the Owner of the TRI P equipment Anothther group of the Inst. is active at CERN in LHCb Interest at ISOLDE: Radium isotopes for ATOMIC Fundamental Symmetries Studies (i.e. at low energy Isolde) The ION-group is interested in information on howto approach ISOLDE Presently is not using nor has plans to use the TRI P-separator equipment Is open for discussing the move of TRI P-separator to HIE-ISOLDE To be discussed: Collaboration Timescale for the move and use The ions group of VSI does not foresee its own use of TRI i.e. it is not interested in paying the move or things related to the installation of TRI However, it is interested to discuss TRI P-separator as an inkind contribution towards membership at ISOLDE?? The power-supplies are not included in the equipment, some never existed and some are already being used elsewhere. + 4 PhD students Nikhef: https://www.nikhef.nl/https://www.nikhef.nl/ Nationaal instituut voor subatomaire fysica is active at CERN and is the National contact towards CERN. There will probably be discussions (spring) between the VSI-institute and Nikhef about the strategy of the groups for next future this will probably include the VSI plans for the future use of the TRI P-separator. TRI P separator 13 B1-B4 4 dipole- & Q1-Q9 8 quadrupole- magnets Q3 was omitted in final design Slits Sec. 1 Dispersion: Separate isotopes of different rigidity Sec. 2 reversed: Achromatic image Dipole magnets H-type DANFYSIK Target spot size +/-2 mm horizontal +/- 1 mm vertical 14 Slits MiniBall The time of flight vs. energy loss in a 100 mm silicon detector shows various nuclides at the intermediate plane (T2). Sec. 2 reversed: Achromatic image At the final focal plane (T3) there is only 21 Na and a small contamination of stable 20 Ne which could be reduced to below 0.5 % TRI P: Test Case 21 Ne 43 MeV/u on 20 mg/cm 2 polyethylen Flight path = m Half or Full TRI P ? Vamos HIE-ISOLDE hall layout trench Beamine cable trays Ion beam focus: in the middle of the trench 10 m Maximum space 8 m HIE-ISOLDE hall layout (not up to date) Objectives : 03/11/14 XT00-XT01 available for tests 12/01/15 XT02 available for tests Inventory : 22 MQ + 41 PC (22+19 for REX) 4 MB + 4 PC 11 MC + 22 PC (1 per plane) 10m2mc 5 m AGENDA TRI P meeting Groningen March 2015 Olof Tengblad: HIE ISOLDE Place: University of Groningen, the faculty for mathematics and science Fundamental Interactions and SymmetriesGroningen: Klaus Jungmann, Hans Wilschut, Lorenz WillmannISOLDE: Olof Tengblad Joakim Cederkll Wilton Catford ISCC, Technical group Information to be exchanged & Questions to be discussed: TRI P 1a.) The TRI P separator : Specs, use half or full? Footprint, weight? 2a.) Equipment needed existing? Power supplies Racks, Rails?, 3.) Administrative problems Owner, transport (on loan or permanent) 4.) Local collaboration? Experiments at ISOLDE? ISOLDE 1b.) Available footprint? Use half or full spectrometer? 2b.) Accepted standard at ISOLDE for installation of Power supplies Racks, Rails?, 5.) The intended use of the separator at ISOLDE in order to motivate the move of the equipment also on scientific ground. (Joakim & Wilton) 6.) What is a realistic time scale for the installation and use of the separator at ISOLDE? (Olof) 7.) To become ISOLDE member?