Publications by Jaya John John


Pixel imaging mass spectrometry with fast silicon detectors

Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment (2010)

A Nomerotski, S Adigun-Boaye, M Brouard, E Campbell, A Clark, J Crooks, JJ John, AJ Johnsen, C Slater, R Turchetta, C Vallance, E Wilman, WH Yuen


The LCFIVertex package: Vertexing, flavour tagging and vertex charge reconstruction with an ILC vertex detector

Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 610 (2009) 573-589

D Bailey, E Devetak, M Grimes, K Harder, S Hillert, D Jackson, T Pinto Jayawardena, B Jeffery, T Lastovicka, C Lynch, V Martin, R Walsh, P Allport, Y Banda, C Buttar, A Cheplakov, D Cussans, C Damerell, N De Groot, J Fopma, B Foster, S Galagedera, R Gao, A Gillman, J Goldstein, T Greenshaw, R Halsall, B Hawes, K Hayrapetyan, H Heath, J John, E Johnson, N Kundu, A Laing, G Lastovicka-Medin, W Lau, Y Li, A Lintern, S Mandry, P Murray, A Nichols, A Nomerotski, R Page, C Parkes, C Perry, V O'Shea, A Sopczak, K Stefanov, H Tabassam, S Thomas, T Tikkanen, R Turchetta, M Tyndel, J Velthuis, G Villani, T Wijnen, T Woolliscroft, S Worm, S Yang, Z Zhang

The precision measurements envisaged at the International Linear Collider (ILC) depend on excellent instrumentation and reconstruction software. The correct identification of heavy flavour jets, placing unprecedented requirements on the quality of the vertex detector, will be central for the ILC programme. This paper describes the LCFIVertex software, which provides tools for vertex finding and for identification of the flavour and charge of the leading hadron in heavy flavour jets. These tools are essential for the ongoing optimisation of the vertex detector design for linear colliders such as the ILC. The paper describes the algorithms implemented in the LCFIVertex package as well as the scope of the code and its performance for a typical vertex detector design. Crown Copyright © 2009.


Charge shielding in the In-situ Storage Image Sensor for a vertex detector at the ILC

Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 607 (2009) 538-543

Z Zhang, KD Stefanov, D Bailey, Y Banda, C Buttar, A Cheplakov, D Cussans, C Damerell, E Devetak, J Fopma, B Foster, R Gao, A Gillman, J Goldstein, T Greenshaw, M Grimes, R Halsall, K Harder, B Hawes, K Hayrapetyan, H Heath, S Hillert, D Jackson, T Pinto Jayawardena, B Jeffery, J John, E Johnson, N Kundu, A Laing, T Lastovicka, W Lau, Y Li, A Lintern, C Lynch, S Mandry, V Martin, P Murray, A Nichols, A Nomerotski, R Page, C Parkes, C Perry, V O'Shea, A Sopczak, H Tabassam, S Thomas, T Tikkanen, J Velthuis, R Walsh, T Woolliscroft, S Worm

The Linear Collider Flavour Identification (LCFI) collaboration has successfully developed the first prototype of a novel particle detector, the In-situ Storage Image Sensor (ISIS). This device ideally suits the challenging requirements for the vertex detector at the future International Linear Collider (ILC), combining the charge storing capabilities of the Charge-Coupled Devices (CCD) with readout commonly used in CMOS imagers. The ISIS avoids the need for high-speed readout and offers low power operation combined with low noise, high immunity to electromagnetic interference and increased radiation hardness compared to typical CCDs. The ISIS is one of the most promising detector technologies for vertexing at the ILC. In this paper we describe the measurements on the charge-shielding properties of the p-well, which is used to protect the storage register from parasitic charge collection and is at the core of device's operation. We show that the p-well can suppress the parasitic charge collection by almost two orders of magnitude, satisfying the requirements for the application. Crown Copyright © 2009.

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