LYCCA: Lund - York - Cologne - CAlorimeter

Status reportL U N DU N I V E R S I T Y

Nuclear StructureGroup

L U N DU N I V E R S I T Y

Nuclear StructureGroup

• RISING Fast Beam Campaign 2003-2005 CATE + CLUSTERS

• RISING Fast Beam Campaign 2009 LYCCA-0 + CLUSTERS

• RISING Fast Beam Campaign 2011 LYCCA-1 + AGATA Demonstrator

• HISPEC/DESPEC @ FAIR 2013 LYCCA + AGATA

L U N DU N I V E R S I T Y

Nuclear StructureGroup

Core device for:

• RISING• HISPEC/DESPEC

Objective is to uniquely identifyevent-by-event exotic nuclei by:

• mass A • charge Z

Flexible array of detectormodules to measure:

• E• ∆E• Position• ToF

• Tracking the reaction products at the secondary target position

L U N DU N I V E R S I T Y

Nuclear StructureGroup

Basic Requirements

Physical segmentation for E and E

Energy resolution E/E 1%

Dynamic range:

from mass A=20 up to mass A=200

from energy ~200 MeV/u down to ~100 MeV/u

Achieved with:

DSSSD & CsI modules

Time resolution better than t 100 ps with ToF

Achieved with:

Si, Diamond, or Fast Plastic detectors

Timing wall options; stop ToF:1. CVD diamond 20 20 mm2. Ultra fast plastic: 10 mm strips3. DSSSD signal from one side

Target position:1. Position: DSSSD2. Start ToF: CVD Diamond3. LYCCA-lcp array

Pavel Golubev, Lund UniversityN

L U N DU N I V E R S I T Y

Nuclear StructureGroup Pavel Golubev, Lund University

Detector constructionE-E modules

E - detector• DSSSD, 58 58 mm2, 310 um, 32 strips on each side• PCB frame, ~ no dead space, wire bonding, connectors

PD readout• PD, 10.5 11.5 mm2, mounted on frame• PCB, signal transport

E - detector• CsI, 19 19 mm2, 13 or 33 mm + 7 mm pyramid lightguide• Teflon wrapping, 3 3 modules per one DSSSD

58.0

mm62

.5 m

m62

.5 m

m

L U N DU N I V E R S I T Y

Nuclear StructureGroup

LYCCA-0

CATE-CsI

CATE-CsI

LYCCA-CsI ”Si timing”

”CVD timing”

”Scint timing”

L U N DU N I V E R S I T Y

Nuclear StructureGroup

Detector lab tests1. CsI + PD

2. DSSSD 300 µm 60×60 mm

• RADCON Ltd• 3 layers of teflon (0.25 mm)• PD 10.5×11.5 mm2

low Cdet R %

•RADCON Ltd• 60.0 × 60.0 mm2, 32 ×32, 303 m• Ctot = 1060 pf, 10-15 nA per strip

L U N DU N I V E R S I T Y

Nuclear StructureGroup

Detector in-beam tests June 2007LYCCA/R3B calorimeter

GWC, TSL, Uppsala:

Energy 179.31±0.80 MeV protons.

Flux reduced to 900 s-1.

LYCCA DSSSD

R% = 0.5%@ 180 MeV p

LYCCA PD

Detector Lab@ LU & DAQ

L U N DU N I V E R S I T Y

Nuclear StructureGroup

• Semi-clean room for detector mounting

• Vacuum chamber Source detector test • Semi-clean room Detector mounting DSSSD bonding• VME, CAMAC, MIN electronic pool New arrival: CAEN Mod.V1724

• 8 channel FADC• 14 bit 100 MS/s• PD preamp signal

L U N DU N I V E R S I T Y

Nuclear StructureGroup

Detector mounting

Semi-clean room for detector mounting

LYCCA DSSSD 60.0 × 60.0 mm2, 32 ×32, 303m

LYCCA single telescope module

mounting jig wire bonding

L U N DU N I V E R S I T Y

Nuclear StructureGroup

L U N DU N I V E R S I T Y

Nuclear StructureGroup

L U N DU N I V E R S I T Y

Nuclear StructureGroup

Detectors & electronics

3 Options:CVD, F Plastic, Si

Important boundarycondition:

January 2009LYCCA-0 should

be ready for RISINGFast Beam Campaign!

L U N DU N I V E R S I T Y

Nuclear StructureGroup

Mechanics

Mechanical parts produced at University of Cologne and GSI:

1. Permanent or movable mechanics to hold two (active) tracking detectors (DSSSD & CVD) + vacuum feedthroughs

2. Extension, 1 m, of vacuum line to new LYCCA-0 chamber3. LYCCA-0 target chamber + feedthroughs4. Shielding of Ge-detectors from background from LYCCA-0

Simulation of LYCCA0: GEANT4 & ROOT

At secondary target position:X mg/cm2

+ 310 m DSSSD+ 300 m CDVX 0.7 g/cm2 , d 2 mWhat is the optimal X, d, t to get the best mass resolution?

• MOCADI as an Event Generator

• Fix ToF distance to investigate detector resolution effects• Simulate with SFRS beam profile• Simulate test experiments with final setup for Coulex, Frag., Transfer• Simulation of full HISPEC

U N I V E R S I T YL U N D

Mike Taylor, York University+ Lund University+ PhD student, GSI

LYCCA Simulation UpdateLYCCA Simulation Update

New Lycca0 geometry implemented(geometry code courtesy of Lund)

TOF timing started by Diamond detector at thetarget position, stopped by Si detectors

Titanium Gated TOF vs EnergyTitanium Gated TOF vs EnergyAA σσ (mb) (mb)42 0.0550

43 0.7896

44 5.3086

45 15.926

46 19.819

47 9.906

48 2.7932

49 0.4612

• At 2m the mass separation is better than the Co case but still a little dirty

• At 3m the separation is approaching an ideal case

New FRS Detector SignalsNew FRS Detector Signals

New version now contains all of the signals from the FRS tracking detectorsas well as particle properties immediately before the secondary target

By including signals from the FRS detectors as one would have in a real experiment the simulation allows real data analysis techniques to be used to investigate the correlations between various detector signals

Analysis with simulated dataAnalysis with simulated data

Si detector (x,y) position spectraa) For all good Si & CsI eventsb) same as a) but now with a gate on SC41 left side (x > -100 & x < 0)

A small correlation is evident from theresulting spectra

U N I V E R S I T Y

Conclusions – LYCCA

(Some) Swedish Issues:• LYCCA led by Lund Nuclear Structure Group• LU synergies with R3B/EXL and Panda Calorimeter

developments and tests; joint existing detector lab and research engineers

• GSI-LU PhD student already associated to the project

General Issues:• Core device for HISPEC• ID reaction products by A and Z, 50-200 MeV/u via E(DSSSD),

E(CsI), t (CVD diamond, ultra fast scintillators, DSSSD)• Modular, flexible system to be used in different configurations

Technical Issues:• Bench and in beam detector components tests• Construction of prototype module• Simulation GEANT4 & ROOT• Development of FEE (T-preamps, E-preamps, … AIDA ASIC)