Student Meeting Jose Luis Sirvent PhD. Student 26/08/2013

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Beam Secondary Shower Acquisition System: Front-End RF Design (2). Student Meeting Jose Luis Sirvent PhD. Student 26/08/2013. 1. The dynamic range and the three lines. Front-End proposal. HV. Civi dec Amplifier. 34dB. Civi dec Diamond Detector. -6dB. DC-4GHz Splitter. 40dB. pCVD. - PowerPoint PPT Presentation

Transcript of Student Meeting Jose Luis Sirvent PhD. Student 26/08/2013

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Beam Secondary Shower Acquisition System: Front-End RF Design (2)Student MeetingJose Luis SirventPhD. Student26/08/2013-20dB40dB-6dBpCVDCividecAmplifierAttenuatorCividecDiamond DetectorDC-4GHzSplitter-6dB-6dBDC-4GHzSplitter-6dB34dB-12dB-32dB-6dBHV12VTunnelSurface1. The dynamic range and the three linesFront-End proposalTermination50Fc= 5 HzLow Pass FilterDCNot yet clear:If DC measurement is necessary then -9dB splitter: Needed lines 34dB, -15dB & -35dB2. ADC or QIE10?ADC Needed filters in lines 200MHz 2GHzQIE10 Needed Amplif DC-2GHz or no AmplifProblem for Long lines + QIE10??

21.Front-End amplifier selectionOption 1: Commercial from Cividec

Price: 1755 CHFPrice: 1755 CHF1.Front-End amplifier selectionOption 2: Build our own amplifier with Gali + MGA Cheaper alternativeDevelopment of a boardInside Cividec 40dBGali 52 (Price: 1.2)Agilent MGA-62563 (Price: 8.2)

Radiation Tolerance:Tested in 2005

http://lhc-expt-radmon.web.cern.ch/lhc-expt-radmon/meetings/2005-03/Gorisek-BCM%20in%20ATLAS.pdf

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1.Front-End amplifier selectionOption 3: Evaluation Boards (20dB) from Mini-Circuits

(Price: 52)

http://217.34.103.131/pdfs/GALI-52+.pdfhttp://217.34.103.131/pcb/WTB-409-52+_P02.pdf5

1.Front-End amplifier selectionOption 4: Build our own amplifier with BJTs

http://www.intersil.com/content/dam/Intersil/documents/an15/an1503.pdf

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2. Noise study in lines (In simulation)

New!

Measured in SPS BA52. Noise study in linesExample of digitalization with noise (Sigma=6.4mV)

ADC Shaper OffQIE10ADC Shaper On82. Noise study in linesEvolution of the Beam Sigma Error VS Noise

Considerations:The noise is white: Distributed in the whole spectrumADC Shaper On Still affected but working better than Shaper Off, in practice the results should be better.

The 40dB amplifier: Considered in simulations as ideal DC-infinite Hz (In reality RF 1MHz-2GHz)The 34dB line in practice could not be used by the QIE10 since it has a high-pass filter, the value used should be -6dBObservations:QIE10 performs well by integrating , the mean noise value is 0 so in certain way integration filters noise.As specked GausFit error increases with noise up to near 10% for these conditions and Noise sigma=102.4mVFor low noise (sigma < 1.6mV) Best ADC Shaper ON / For high noise (sigma > 1.6mV) Best QIE10

-20dBpCVDAttenuatorCividecDiamond Detector-6dBDC-4GHzSplitter-6dB-6dB-20dBHVTunnelSurface2. Noise study in linesFor QIE10 we cannot amplifysoLong lines QIE10 Front-End proposalTermination50Long CK50 link (~100m)Fc= 5 HzLow Pass FilterDC

QIE1010

2. Noise study in linesFor QIE10 we cannot amplifysoConsiderations:Metres of cable considered for the simulations: 100mIn any case not taken into account impedance mismatching / reflections

Observations:For same conditions in average QIE10 performs betterObviously in the previous case QIE10 part of the scan was amplified (by simulation) and therefore the SNR was better Tendency shown as previouslyQIE10 performance affected by noise and lines attenuation (SNR)