Andre, C.

Bräuning, H.

Dorn, C.

Hoffmann, T.

Kaufmann, W.

Kotovskiy, N.

Reeg, H.

Reiter, A.

Schwickert, M.

Sieber, T.

Vorobyev, G.

Walasek-Höhne, B.

Witthaus, M.

GSI Repository

Beam Instrumentation for CRYRING@ESRA. Reiter1, C. Andre1, H. Bra¨uning1, C. Dorn1, T. Hoffmann1, W. Kaufmann1, N. Kotovskiy1, H.Reeg1, T. Sieber1, M. Schwickert1, G. Vorobyev1, B. Walasek-Ho¨hne1, and M. Witthaus11GSI, Darmstadt, GermanyIntroductionThis report gives an overview of the beam instrumen-tation of the CRYRING@ESR experimental storage ringthat is currently in the process of installation at GSI.CRYRING@ESR (see Fig. 1), together with ESR and HI-TRAP decelerator, will provide new opportunities for var-ious research fields. An independent RFQ injector linacis available for commissioning of the new machine whereFAIR standards will be applied for the first time. Threemain concepts influence aspects of beam instrumentation:• FESA: CERN Front-End Software Architecture, a de-velopment framework for data acquisition (DAQ) sys-tems. Like any accelerator equipment, a DAQ sys-tem is required to provide a FESA control interfacefor seamless control system integration.• GMT: General Machine Timing system, a new preci-sion timing system with sub-ns precision based on theWhite Rabbit protocol. One programmable timing re-ceiver board is installed in each DAQ system and con-trols execution of real-time actions and DAQ triggers.• LSA: CERN LHC Software Architecture, the newdata supply model for accelerator components. FromLSA DAQ systems receive information on beam pro-duction, e.g. ion species, energy, charge state, that isneeded for on-line calculations.Linac InjectorThe injector beam line will be equipped with dual detec-tors as used at HITRAP consisting of Faraday cup (FC) andviewing screen (SCR) on a common stepper motor drive.Two units, one before and one after the 90◦ spectrometer,match the ion source beam to the RFQ entrance. Two fur-ther units match the RFQ beam to the CRYRING injection.Longitudinal matching is adjusted by a new debuncher. Forphase and energy measurements, three capacitive pickupshave been added. The FC readout will be adopted from ex-isting FESA systems. The SCR readout is described in [2].CRYRINGAfter transport to GSI at the end of 2012, all detectors,front-end amplifiers and special low-noise electronics werecarefully checked. Non-intercepting detectors are the eightbeam position monitors (BPM), an integrating/parametriccurrent transformer for bunched/coasting beam (ICT/PCT),PCTIPMICTIPMSchottkyFC+SCRSCRFC FC+SCRBPMBPMBPMBPMBPMBPMBPMBPMFigure 1: Layout and Diagnostics of CRYRING@ESR.two ionisation profile monitors (IPM) and Schottky elec-trodes. Most equipment can be integrated in the new DAQsystems. Only new low-noise BPM amplifiers had to bedesigned with switchable 40/60 dB gain and bandwidth fil-ter. The BPM DAQ is a new design based on µTCA com-ponents, a modern telecommunication standard with highthroughput and reliability. The signals are acquired by 250MSa/s ADCs of 16 bit resolution and position evaluationtakes place directly on an FPGA. A prototype system is ex-pected to be ready by the end of this year. For intensitymeasurements a VME scaler system combines signals ofdifferent detectors: Schottky and BPM sum signals, IPMcount rates, ICT and PCT transformer signals. For pro-file measurements the IPMs are equipped with position-sensitive resistive anode encoders. The pre-amplifier sig-nals are shaped in a spectroscopy amplifier and the outputsignals analysed by a peak-sensing ADC in a VME DAQwhich calculates the histograms.The existing 1st turn FC diagnostics will be upgraded bynew FC and SCR detectors of FAIR standard. One specialscreen will be added at the end of the new injection sectionthat has been upgraded for higher injection energies.References[1] M. Lestinsky et al., CRYRING@ESR Study Group Report,June 2012[2] B. Walasek-Ho¨hne, CUPID, this GSI reportGSI SCIENTIFIC REPORT 2013 FG-CRYRING-01doi:10.15120/GR-2014-1-FG-CRYRING-01 FAIR@GSI 367 FG-CRYRING-01 GSI SCIENTIFIC REPORT 2013368 doi:10.15120/GR-2014-1-FG-CRYRING-01

Beam Instrumentation for CRYRING$@$ESR

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Beam Instrumentation for CRYRING $@$ ESR

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Beam Instrumentation for CRYRING@@@ESR

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Beam Instrumentation for CRYRING $@$ ESR