The R 3 B CALIFA Endcap Design and expected performance Roman - - PowerPoint PPT Presentation

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The R 3 B CALIFA Endcap Design and expected performance Roman - - PowerPoint PPT Presentation

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The R 3 B CALIFA Endcap Design and expected performance Roman Gernhuser Physik-Department E12, Technische Universitt Mnchen CALIFA Working Group USC-IEM-UVigo GSI-TUM Chalmers JINR - NRC CFNUL EMMI-TUD Lund Roman Gernhuser The

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SLIDE 1

Roman Gernhäuser The CALIFA Endcap – NUSTAR week March 2015 – GSI 1 Roman Gernhäuser Physik-Department E12, Technische Universität München

Design and expected performance

The R3B CALIFA Endcap

CALIFA Working Group

USC-IEM-UVigo GSI-TUM EMMI-TUD Chalmers Lund CFNUL JINR - NRC

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SLIDE 2

Roman Gernhäuser The CALIFA Endcap – NUSTAR week March 2015 – GSI 2

FAIR Facility for Anti-proton and Ion Research

SIS 100/300 S-FRS R3B

Outline:

  • Introduction

– R3B, CALIFA – (p,2p) scattering as an example

  • Phoswich detectors
  • iPhos technique
  • Expected performance
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SLIDE 3

Roman Gernhäuser The CALIFA Endcap – NUSTAR week March 2015 – GSI 3

R3B

Reactions with Relativistic, Radioactive Beams

Wed 12:25 Roy Lemmon Thu 11:55 Konstanze Boretzky Thu 12:20 Anatoly Krivshich Fri 11:10 Thomas Aumann

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SLIDE 4

Roman Gernhäuser The CALIFA Endcap – NUSTAR week March 2015 – GSI 4

Separationsenergie

) ( *

1 2 1 

    

A A p

T T T T E S

interner Impuls

2 1 1

p p p p q

A A

   

Nucleus excited fragment

A

A-1 free target proton transfer momentum q photon(s) bound proton

q

p,n,d,t,... evaporated

1 2

scattered protons:

  •  back-to-back 
  • opening angle  80°

Experiment

Quasi-free scattering of exotic nuclei in inverse kinematics ~700 AMeV Requirements for CALIFA:

  • high dynamic range

100keV γ-rays – 700 AMeV charged particles

  • high efficiency
  • high granularity -> Doppler correction
  • particle identification
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SLIDE 5

Roman Gernhäuser The CALIFA Endcap – NUSTAR week March 2015 – GSI 5

CALIFA

Barrel & Forward Endcap Array

700 AMeV

CALorimeter for In Flight detection

  • f g-rays and charged pArticles.

large solid angle maximum efficiency good resolution easy access to target area

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SLIDE 6

Roman Gernhäuser The CALIFA Endcap – NUSTAR week March 2015 – GSI 6

The Combined Concept

QFS @ 700AMeV length limit 22cm:

  • geometrical space,
  • light collection
  • crystal properties
  • efficiency and cost

IPHOS

Intrinsic Phoswich Detectors

CEPA

Califa Endcap Phoswich Array eff. 15% .. 50% DE -> E separate reactions

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SLIDE 7

Roman Gernhäuser The CALIFA Endcap – NUSTAR week March 2015 – GSI 7

Segmentation and Doppler Broadening

EP = 400 AMeV EP = 700 AMeV balance :

  • doppler broadening

  • rate /mult. capability

  • intrinsic resolution

  • calorimetric properties

  • costs

  • …..

CEPA IPHOS Q(°) Q(°) DQ(°) DQ(°)

6% 2% 6% 2%

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SLIDE 8

Roman Gernhäuser The CALIFA Endcap – NUSTAR week March 2015 – GSI 8

CEPA - the Phoswich Part

8 Materials DE/E (% at 662 keV) Light yield (photons/ keV) Decay time (ns) λemision LaBr3 2.9 63 16 380 nm LaCl3 3.8 49 28 350 nm

  • high rate capability
  • best resolution
  • high light yield
  • depth information
  • redundant DE for particles

2 scintillators 1 readout

  • ptical comp.
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SLIDE 9

Roman Gernhäuser The CALIFA Endcap – NUSTAR week March 2015 – GSI 9

CEPA4: a bigger phoswich array

counts total amplitude

(Ilong-Ishort)/Ilong 2 crystals with different light yield & different decay time with common readout

VME CAEN Flash ADC (V1742) to digitize the signals

40mm LaBr3 60mm LaCl3

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SLIDE 10

Roman Gernhäuser The CALIFA Endcap – NUSTAR week March 2015 – GSI 10

Reconstruct Proton Energy

CEPA4 (10cm)

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SLIDE 11

Roman Gernhäuser The CALIFA Endcap – NUSTAR week March 2015 – GSI 11 Particle identification in CsI(Tl) using digital pulse shape analysis –

  • W. Skulski, M. Momayezi, NIM A 458, (2001) 759-771

IPHOS - CsI(Tl) IPHOS

Intrinsic Phoswich array

CEPA

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SLIDE 12

Roman Gernhäuser The CALIFA Endcap – NUSTAR week March 2015 – GSI 12

' ) ' exp( τ t'

  • τ

t'

  • Pream

s f ADC

dt t t U

t

     )] )] exp( S ) exp( [F [F

MWD

Differentiation

) exp( 1

s

τ t

  • MWD

S S F

RPID particle identification

  • M. Bendel, RG, EPJA 63, (2013)
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SLIDE 13

Roman Gernhäuser The CALIFA Endcap – NUSTAR week March 2015 – GSI 13

p(12C,X) p‘ @ 80 AMeV (LNS, Catania, Italy)

PID with CsI(Tl) Nf / Ns depends on the ionization density?

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SLIDE 14

Roman Gernhäuser The CALIFA Endcap – NUSTAR week March 2015 – GSI 14

474 MeV Protons @ TRIUMF

150mm

Nf(a.u.) Nred(a.u.)

Beam

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SLIDE 15

Roman Gernhäuser The CALIFA Endcap – NUSTAR week March 2015 – GSI 15

Select Reactions

Protons @500MeV

  • 50% reactions (25cm)
  • large background
  • low (p, 2p) efficiency

Nf(a.u.) Nred(a.u.)

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SLIDE 16

Roman Gernhäuser The CALIFA Endcap – NUSTAR week March 2015 – GSI 16

GSI FEBEX Readout

FEBEX3B:

  • ADC, 16 ch, 14 Bit, 50 MHz
  • Lattice ECP3 150 FPGA
  • Timestamp synchronization
  • Programmable via GOSIP

FAB_ Addon:

  • Digital to Analog converter for

programmable baseline offset

  • 25 MHz Bessel Nyquist filter

DAC Filter Preamp ADC FPGA

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SLIDE 17

Roman Gernhäuser The CALIFA Endcap – NUSTAR week March 2015 – GSI 17

Add On Boards

Digital Pulse Generator

  • 210 MS/s, 14 bit DAC
  • 2-pole low-pass filter
  • 8 channel analog multiplexer
  • CsI(Tl) pulse form with adjustable PID
  • controlled via USB or GOSIP
  • generates DAQ trigger and SC event

Time (20 ns) ADC channel

DAC Filter Preamp ADC FPGA DRS4 FPGA

SCA Add-On Board

  • Switched capacitor array

(analog ringbuffer)

  • PSI DRS4:

Up to 5 GHz sampling 33 MHz read out rate

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SLIDE 18

Roman Gernhäuser The CALIFA Endcap – NUSTAR week March 2015 – GSI 18

Photopeak Efficiency

Endcap Barrel Califa Barrel + Endcap coulex

 Sum all detectors ▲ Photon reconstruction corrected for geo acceptance

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SLIDE 19

Roman Gernhäuser The CALIFA Endcap – NUSTAR week March 2015 – GSI 19

Energy Resolution

Endcap Barrel  = 0.82, projectile frame perfect detectors 5% CsI(Tl) resolution 6% CsI(Tl) resolution @ 1MeV

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SLIDE 20

Roman Gernhäuser The CALIFA Endcap – NUSTAR week March 2015 – GSI 20

g-ray Spectroscopy

One Neutron Knockout from 23O

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SLIDE 21

Roman Gernhäuser The CALIFA Endcap – NUSTAR week March 2015 – GSI 21

18O(p,2p)17N

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SLIDE 22

Roman Gernhäuser The CALIFA Endcap – NUSTAR week March 2015 – GSI 22

Summary & Outlook

  • Very good efficiency up to 15MeV
  • 6% resolution above 1MeV
  • iPhos method for reconstruction of high energy particles

proven

  • CEPA Demonstator successfully tested
  • TDR for the CALIFA Endcap handed in Nov. 2014
  • start construction in 2015
  • setup and commissioning 2017
  • day-0 experiments in 2018
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Roman Gernhäuser The CALIFA Endcap – NUSTAR week March 2015 – GSI 23

Thank you very much for your attention

CALIFA Working Group

USC-IEM-UVigo GSI-TUM EMMI-TUD Chalmers Lund CFNUL JINR - NRC