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Development of a Waveform Sampling ASIC with Femtosecond Timing for a Low Occupancy Vertex Detector.

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Title:Development of a Waveform Sampling ASIC with Femtosecond Timing for a Low Occupancy Vertex Detector.
Authors:Orel, Peter
Contributors:Electrical Engineering (department)
Date Issued:May 2018
Publisher:University of Hawaiʻi at Mānoa
Abstract:Vertex detectors provide space-time coordinates for the traversing charged particle decay products
closest to the interaction point of a high-energy particle collider. Resolving these increasingly
intense particle
uences at higher luminosities (larger number of collisions per second) is an ever-
growing challenge. Furthermore, such
uences result in a non-negligible occupancy of the vertex
detectors using existing low material budget techniques. Consequently, new approaches are being
studied that meet the vertexing requirements while lowering the occupancy and the data rate.
In this work we introduce the architecture and speci cations for a novel vertex detector design
based on femtosecond precision timing. The feasibility study results indicate that the new detector
ladder design could achieve an occupancy ten times lower than its predecessor in the Belle II
spectrometer, while maintaining a comparable spatial resolution. Furthermore, this leads to a
considerable reduction in the detector data rate, thus lowering the cost of the subsequent processing
electronics. One of the crucial parts of the detector is its readout ASIC (RFpix), whose development
steps are discussed in detail. The RFpix is a twelve-bit resolution waveform digitizer with a sampling
speed of 20 GS/s and an analog bandwidth of 3 GHz. Post-layout simulation results of the RFpix
prototype analog front-end are shown and thoroughly analyzed. The simulated performance is
shown to match the RFpix requirements, thus reaching an exquisite timing resolution of 160 fs.
Description:Ph.D. Thesis. University of Hawaiʻi at Mānoa 2018.
Rights:All UHM dissertations and theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission from the copyright owner.
Appears in Collections: Ph.D. - Electrical Engineering

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