Time-of-Flight Detector for Isochronous Mass Spectrometry

at the ESR

Yuri A. Litvinov05 December 2007

Fragment Separator

FRS

Secondary Beams of Short-Lived Nuclei

Productiontarget

StorageRingESR

Heavy-IonSynchrotron

SIS

LinearAccelerator

UNILAC

Isochronous Mass Spectrometry1985 - H. Wollnik, Y. Fujita, H. Geissel, G. Münzenberg, et al.

Isohronous Mass Spectrometry (IMS)

tγ→γ

ims_basic2.swf

Time-of-Flight detector for the IMS

Data acquisition for the IMS

Le Croy LC584AMTektronix TDS7404

40 GS/s /channel

10 Gs/s 2 channels 8 Gs/s 2 channels

Foil thickness for the IMS

Primary beam 238U90+ 396 MeV/uBeam spread dp/p = 1 %

Signals from single particles

1 revolution ~ 500 ns

rise time < 0.5 nswidth ~ 4 ns

Timing ~ 10-50 ps

Constant fraction algorithm

Extracted time isindependent from-rise time of a signal-amplitude of a signal

Time-of-Flight Spectra 135Sn setting m/q range is 2.4-2.7

FAIR - Facility for Antiproton and Ion Research

100 m

UNILACSIS 18

SIS 100/300

HESR

SuperFRS

NESR

CRRESR

GSI todayGSI today Future facilityFuture facility

ESR

FLAIR

Two TOF Detectors

GSI, JLU Giessen