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A new position sensitive strip array

T. ransfer. R. eaction. A. rray. A new position sensitive strip array. Wilton Catford (Surrey, UK) with LPC Caen, Birmingham, Paisley. TiaRA : transfer reaction array. Strip detector box to fit inside EXOGAM Position sensitive, resistive strips Forward (& back) angle annular strips

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A new position sensitive strip array

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  1. T ransfer R eaction A rray A new position sensitive strip array Wilton Catford (Surrey, UK) with LPC Caen, Birmingham, Paisley

  2. TiaRA : transfer reaction array • Strip detector box to fit inside EXOGAM • Position sensitive, resistive strips • Forward (& back) angle annular strips • Design aimed at coincidence transfer work • Also suits coulex and fusion-evaporation • New development, subject of new grant bid

  3. Light particle in strip array, record angle and energy Heavier particle or sequential breakup fragment in segmented zero degree detector nucleon transfer Gamma ray(s) in EXOGAM, energy gives accurate excitation energy, even when using quite thick target

  4. Gamma ray(s) in EXOGAM a p Evaporation residue and forward scattered beam continues beyond view of gamma array fusion- n p evaporation Light charged particles in strip array, record angle and energy for channel selection and Doppler correction Energy loss in Si gives particle ID

  5. Scattered beam particles in strip array, measuring angle and energy for multi-step excitation in large angle scattering, and also allowing Doppler correction Forward angle scattering can be identified beyond the array, e.g. using MEGHA, for low states coulomb excitation Gamma ray(s) in EXOGAM

  6. Position sensitive silicon strip detectors resistive strips Signal taken from each end of each strip strips each 3mm wide 50 mm square

  7. PC DAQ system for TRA System under development with LPC Caen and GANIL CAEN N568 amps CAENet trigger NIM GANIL adc/tdc’s signals CAMAC VXI-C DIGITAL 8 Gb disk DLT VIC bus event flow SUNsort DEC VME SUN a UDP/IP data and control

  8. Proposed deployment of TRA • At end of LISE in D6, using beam from LISE production target • At end of LISE in D6, using beam from SISSI production target, with energy tagging in first LISE dipole • In each of above, using 4 EXOGAM detectors in close geometry • In each of above, possibly using DEMON or sweeping magnet • With EXOGAM-12 in G2 with SISSI or SPIRAL beams • As above, with alternative MEGHA detector at forward angles • In front of VAMOS and simultaneously with EXOGAM-12 in G1

  9. elastic scattering final states nucleon transfer incident beam sequential break up p n n Coulomb excitation fusion- evaporation direct breakup

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