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Motivation behind LYCCA at FAIR Diamond detector design Initial tests at Texas A&M University PowerPoint Presentation
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Motivation behind LYCCA at FAIR Diamond detector design Initial tests at Texas A&M University Current work. Polycrystalline Diamond Detectors for Fast Timing Applications at FAIR Lianne Scruton, University of York. Motivation.

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Presentation Transcript
slide1
Motivation behind LYCCA at FAIR

Diamond detector design

Initial tests at Texas A&M University

Current work

Polycrystalline Diamond Detectors for Fast Timing Applications at FAIR Lianne Scruton, University of York

motivation
Motivation
  • LYCCA : Lund-York-Cologne-Calorimeter shall be placed at the end of Super-FRS at FAIR as part of HISPEC campaign.
  • Based on CATE calorimeter used for RISING campaign, with the addition of time-of flight (TOF) measurements for better fragment identification.
  • Simulations by Mike Taylor show that TOF detectors require resolution of at least 100ps, ideally less than 50ps.

53Fe

52Fe

51Fe

50Fe

LYCCA

Wall Detectors

Target Detectors

Super-FRS

the design
The Design
  • Wafers of polycrystalline diamond purchased from Diamond Detectors Ltd measuring 20 x 20 mm, and 300µm thick.
  • Contacts fabricated at University of Surrey.

Front contacts: divided into four strips for lower capacitance

Back contacts: full pad for grounding purposes

PCB: specially deigned for high frequency signals and impedance matched

slide4

Texas A&M University

  • Detectors positioned in transmission geometry so that 500MeV and 800MeV of energy was deposited into front and back detectors respectively.

High Frequency Cables

40 MeV/u Ar40

15mm

Leading Edge Discriminator found to produce best results

slide5

Results

95ps resolution per detector

FWHM = 134ps

FWHM = 104 ±

slide6

Results

Ne20

15mm Flight Path

O16

slide7

Results

O16

30mm Flight Path

Ne20

slide8

Current Work

Data taken at University of Birmingham, using scattered 50MeV 3He beam.

14.6 pF

Rise time < 0.5 ns

8.11 pF

1.95 pF

(ns)

thank you for listening
Thank You for Listening

Collaborators:

M.A.Bentley, B.S.NaraSingh and S.P.Fox

University of York, UK

F.Schirruand A.Lohstroh

University of Surrey, UK

L.Trache, A.Banuand rest of RET Group

Cyclotron Institute, Texas A&M University

M.Freer, D.Parkerand Cyclotron staffUniversity of Birmingham, UK

Thanks to M.J.Taylor and D.Bloor for figures in slide 2