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TAPS at the KVI in 2005 What are the physics goals? What is the required setup? What is the present status? What still needs to happen? Who is involved? When do we plan to be ready? 1997 op het KVI 18/03/2004 H.L., TAPS at KVI in 2005 1 proposals involving TAPS at KVI prop # bremsstrahlung studies 117 shifts method R20 (A-) p + A p’ + + X The role of multiple scattering for soft photon quenching 70 (88) in Pball or TAPS p’ in Pball or BBS R14 (B+) d + 3He 4He + p + Test of soft-photon approximation for bremsstrahlung in transfer reactions 22 (22) in Pball or TAPS 4He in BBS (ESN) 18/03/2004 H.L., TAPS at KVI in 2005 2 proposals involving TAPS at KVI prop # 0 production studies + 6Li 12C + + 0 Pionic fusion: probe of subnucleonic d.o.f. in nuclei R19 A+ 6Li S42 A 3He 18/03/2004 + 4He 7Be* + 0 + 10B 12C + + 0 Pionic fusion: comparison of different spin/isospin channels 2H 60 shifts method 40 (40) 12C in BBS HI det. (0 ) in TAPS 0 in Pball (TAPS) 20 (20) H.L., TAPS at KVI in 2005 fusion product in BBS HI det. (0 ) in TAPS 0 in Pball (TAPS) 3 Interacting cluster model Kajino, Toki, Kubo, PRC 35(87)1370 correlated microscopic cluster wave functions using Resonating Group Method (RGM), NN effective interaction + Coulomb (check charge symmetry), entrance channel distortions by local imaginary potential WD between clusters (from DWBA) compared to shell model wave functions data suggest importance of cluster correlations 18/03/2004 H.L., TAPS at KVI in 2005 4 Effect of cluster structures on production p-wave 4He 7Be* 10B d n 3He d 0 s-wave 9Be 12C* very complementary! 0 similar processes but with increasing complexity in cluster structure: 3He + 9Be experiment is very complementary, crucial for cluster mechanism: requires 39 additional shift! 18/03/2004 0 6Li n 3He 12C* 6Li d d 0 12C* contacts with theorists: A. Volya (ANL), co-author B. H. Toki (RMF + field) calculates cluster structure of 8Be C. O. Scholten, R. Timmermans (KVI contact and interest) no final theory predictions yet, theorists wait for systematic experiments! H.L., TAPS at KVI in 2005 5 Planned setup of TAPS with Plastic Ball at the BBS Plastic Ball needs to be re-installed ... and equipped with Inner Shell TAPS needs to be placed New detectors for Heavy Ions in BBS Li beam and target Liquid He target 18/03/2004 H.L., TAPS at KVI in 2005 6 results from experiment F09: d + p 3He + (e+e-) in BBS for 10o ring of in PB (deg.) locus of 2-body final state 3He + 3He 145o 3He (deg.) 3He (deg.) Pball operation together with BBS has been proven 18/03/2004 H.L., TAPS at KVI in 2005 7 Situation around target 18/03/2004 H.L., TAPS at KVI in 2005 8 Inner Shell for Plastic Ball complete set of detectors is ready: 70 elements of CsI, with fixations for hanging inside Plastic Ball 18/03/2004 H.L., TAPS at KVI in 2005 9 busy in front of the BBS + new detectors for heavy ions behind the BBS: electronics 18/03/2004 H.L., TAPS at KVI in 2005 10 array of detector bars in BBS focal plane array of 50 detectors 100 m plastic/CsI 1.3X4 cm2 for fusion products: 10 -- 30 MeV/u ready to order 335 mm momentum determination ( p/p 1 %) by particle ID and detector position 18/03/2004 H.L., TAPS at KVI in 2005 B 11 Test results with C and O beam energy resolution: 1% (rms) position dependence: 0.3 – 0.9 % 18/03/2004 H.L., TAPS at KVI in 2005 12 Liquid He target: buffer cryostaat L N2 in He gas out 3,4He target gas in Vacuum Specials Co. (NL) L 4He @ 1 bar, 4.2 K Design is finalized: pumping on the cool-cel with liquid 4He (50 mbar) we reach a temperature of 2K target tests planned in summer 2004 pumping pipe 10 cm mounting as for LH2 target valve adjusting pumping speed 3,4He cool-cel 50mbar, 2K 18/03/2004 target gas target holder H.L., TAPS at KVI in 2005 beamheight 13 plan for data acquisition for TAPS++ TAPS LRC 2282 QDC CC A2 BBS + LRC 2282 QDC LRC 2280 CC A2 CBD 8212 PBall + IShell 2280 LRC 4298 PBall + IShell PBall + IShell LRC4291 TDC LRC 2280 CC A2 CBD 8212 Sync Mod H.L., TAPS at KVI in 2005 TDC Dbus Interf. LRC 4299 CC A2 Sync Mod PCI-VME 18/03/2004 PCI-VME LinuxPC PCI-VME PCI-VME LinuxPC PBall + IShell + PBall + BBS HIdet. (FERA QDC) 14 Manpower Co-ordination physics and setup: H. Löhner PlasticBall sub-project: J. Bacelar Collaboration from outside KVI: TAPS collaboration, in particular Giessen, Warsaw (Co-spokespersons), and Zagreb Co-ordinator (design phase): Henk Smit (engineer, drawing office) Co-ordinator (He target): Harry Timersma (research technician) Co-ordinator (setup phase): ? 1 PhD position granted at KVI 1 PhD position hoped for at KVI 1 –3 PhD positions Giessen, Warsaw, Zagreb ? 18/03/2004 H.L., TAPS at KVI in 2005 15