MUST2 general information -TABLE

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MUST2 general information and specifications (Back to the main page)

One module : square, 3-stage telescope [ Si-strip, SiLi, CsI]

Physics of the detector

Type of experiment: Direct reactions induced by radioactive beams on p- and d-rich targets; Use in experiment as main device for measurement of the kinematics of light charged particles (LCP) p,d,t, 3,4,6,8He,Li,Be; protons up to 90 MeV

Observables : Particle identification, Excitation spectra, angular distributions

Typical implantation of the detector reaction chamber (at 15 to 50 cm from target).

REFERENCE : E.C Pollacco and the MUST2 collab EPJA 25, 287 (2005)

Information on MUST2 Si DSSD

Manufacturer Micron S2 http://www.micronsemiconductor.co.uk/

DSSD strip detectors

http://www.micronsemiconductor.co.uk/products-psd.asp?productsubcatID=16

how many, when purchased	6 in 2003
First test of 1 complete module	March 2004
full cost detection+electronics :15kEuros	with cooling box: 6 kEuros [CsI: 5kEuros]
Unit cost total (2013) for one DSSD	9kEuros
first used [whole device]	2007
MUST2 Collaboration	GANIL,IRFU, IPNO
Number of weeks per year [use] preparation + data taking 6 to 12 weeks
Next campaigns	Fall 2013
SPhN contribution %	33
person in charge (SPhN)
Detector details
Maximum energy	45 MeV
Power consumption	28 mW/channel
Capacitance of detector	65 pF
Resistivity : n-type low resistivity	~ 6 kOhm. Cm
Rf block in // with 3pF Cf	60MOhms
thickness (microns)	300
dimension in mm	100 by 100 mm²
x and y strips	for 128 x, 128 y
specificity	E and Time measurement for each strip
ASIC chip "MATE" [16 strips] from SEDI	MUST2 Time & energy
entrance window thickness material Al layer on strips: 400nm
ASIC polarization voltage	+/- 2.5 V, +/- 5 V, and 3.3V, +10V
depletion voltage	Vb ~30 to 40 V
operating voltage	2*Vb; from 60 to 80 V
energy resolution [for 5.5MeV alphas]	40 keV FWHM
Rise time at 2 Vb [for 5.5MeV alphas]	below 8 nsec (10 to 90%)
Time resolution [for 5.5MeV alphas]	250 ps FWHM

DC current, Si detector 20nA [250nA max]

Si(Li) stage - voltage ~ 600V ; CsI stage - voltage ~ 50 V

OPERATION : cooled [~ - 5°C] ; Under Vacuum (at ~4. 10-6 mbar)

STORAGE at GANIL

8 detectors in working conditions in 2013, 2014: additional 2 spare modules/equipment

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#12 - Mise à jour : 04/11/2021