Malcolm John: Publications

Preliminary results using Timepix as a particle tracking detector

Proceedings of Science 95 (2009)

Authors:

R Plackett, K Akiba, M Artuso, F Bayer, J Buytaert, M Campbell, P Collins, M Crossley, R Dumps, L Eklund, D Esperante, L Ferre Llin, A Gallas, M Gandelman, M Gersabeck, V Gligorov, T Huse, M John, X Llopart, D Maneuski, T Michel, M Nicol, C Parkes, T Poikela, E Rodrigues, L Tlustos

Abstract:

A series of tests in CERN’s North Area beam facility have been used to demonstrate the suitability of the Timepix chip, combined with a silicon sensor, as a particle tracking device. Specifically of interest is the potential of a successor to the current chip to be used in the context of an LHCb VELO upgrade. The 55µm square pixels, large active fraction and analogue information make the chip very attractive for forward, high precision tracking systems such as the VELO. In this contribution preliminary results are presented showing the resolution achieved by a Timepix assembly in a 120GeV π beam, over a wide range of incident angles. At the optimum angle the detector was able to provide an unbiased track residual of 5.5µm. The telescope constructed for these measurements contributed a track extrapolation error of 2.5µm. The plans for a future development of this telescope, also based on Timepix assemblies are discussed, with proposals for upgrading its spatial and timing resolution.

Synchrotron tests of 3D Medipix2 and TimePix X-Ray Detectors

IEEE Nuclear Science Symposium Conference Record (2009) 2145-2150

Authors:

A Mac Raighne, KC Akiba, L Alianelli, M Artuso, R Bates, F Bayer, J Buytaert, P Collins, M Crossley, L Eklund, C Fleta, A Gallas, M Gandelman, M Gersabeck, EN Gimenez, V Gligorov, T Huse, M John, LF Llin, M Lozano, D Maneuski, J Marchal, T Michel, M Nicol, G Pellegrini, DE Perira, R Plackett, V O'Shea, C Parkes, E Rodrigues, KJS Sawhney, N Tartoni, P Vazquez

Abstract:

In this article we report on the use micro-focus synchrotron X-ray radiation and pion beams to compare the detection efficiencies and charge sharing properties of novel 3D detectors to that of the current planar technology. Detector substrates are bump-bonded to the Medipx2 and Timepix chips. 55μm square pixel maps of the detection efficiencies have been produced using X-ray and MIP beams. For X-rays, a drop of 3-4% detection efficiency over the pixel area was found due to the central electrode. The corner electrodes show no degradation in efficiency compared to that of the planar device. For MIPs a drop of 0.5% in efficiency due to the central electrode was observed. Evidence of a considerable reduction in charge sharing in the 3D detectors compared to the planar devices is also shown. ©2009 IEEE.

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The LHCb detector at the LHC

Journal of Instrumentation 3:8 (2008)

Authors:

A Augusto Alves, LM Andrade Filho, AF Barbosa, I Bediaga, G Cernicchiaro, G Guerrer, HP Lima, AA Machado, J Magnin, F Manijo, JM De Miranda, A Reis, A Santos, A Toledo, K Akiba, S Amato, B De Paula, L De Paula, T Da Silva, M Gandelman, JH Lopes, B Maréchal, D Moraes, E Polycarpo, F Rodrigues, J Ballansat, Y Bastían, D Boget, I De Bonis, V Coco, PY David, D Decamp, P Delebecque, C Drancourt, N Dumont-Dayot, C Girard, B Lieunard, MN Minard, B Pietrzyk, T Rambure, G Rospabe, S T'Jampens, Z Ajaltouni, G Bohner, R Bonnefoy, D Borras, C Carloganu, H Chanal, E Conte, R Cornat, M Crouau, E Delage, O Deschamps, P Henrard, P Jacquet, C Lacan, J Laubser, J Lecoq, R Lefèvre, M Magne, M Martemiyanov, ML Mercier, S Monteil, V Niess, P Perret, G Reinmuth, A Robert, S Suchorski, K Arnaud, E Aslanides, J Babel, C Benchouk, JP Cachemiche, J Cogan, F Derue, B Dinkespiler, PY Duval, V Garonne, S Favard, R Le Gac, F Leon, O Leroy, PL Liotard, F Marin, M Menouni, P Ollive, S Poss, A Roche, M Sapunov, L Tocco, B Viaud, A Tsaregorodtsev, Y Amhis, G Barrand, S Barsuk, C Beigbeder, R Beneyton, D Breton, O Callot, D Charlet

Abstract:

Large detector systems for particle and astroparticle physics; Particle tracking detectors; Gaseous detectors; Calorimeters; Cherenkov detectors; Particle identification methods; Photon detectors for UV. visible and IR photons; Detector alignment and calibration methods; Detector cooling and thermo-stabilization; Detector design and construction technologies and materials. The LHCb experiment is dedicated to precision measurements of CP violation and rare decays of B hadrons at the Large Hadron Collider (LHC) at CERN (Geneva). The initial configuration and expected performance of the detector and associated systems. as established by test beam measurements and simulation studies. is described. © 2008 IOP Publishing Ltd and SISSA.

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Performance of the LHCb vertex detector alignment algorithm determined with beam test data

Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment Elsevier 596:2 (2008) 164-171

Authors:

M Gersabeck, S Viret, C Parkes, K Akiba, M Artuso, J Borel, TJV Bowcock, J Buytaert, P Collins, R Dumps, L Dwyer, D Eckstein, L Eklund, M Ferro-Luzzi, R Frei, G Haefeli, K Hennessy, T Huse, E Jans, M John, TJ Ketel, A Keune, T Laštovička, R Mountain, N Neufeld, A Papadelis, S Stone, T Szumlak, M Tobin, M Van Beuzekom, A Van Lysebetten, TW Versloot, H de Vries, JC Wang

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Measurement of branching fractions and mass spectra of B → Kππγ (vol 98, art no 211804, 2007)

PHYSICAL REVIEW LETTERS 100:19 (2008) ARTN 199905

Authors:

B Aubert, R Barate, D Boutigny, F Couderc, Y Karyotakis, JP Lees, V Poireau, V Tisserand, A Zghiche, E Grauges, A Palano, M Pappagallo, A Pompili, JC Chen, ND Qi, G Rong, P Wang, YS Zhu, G Eigen, I Ofte, B Stugu, GS Abrams, M Battaglia, AB Breon, DN Brown, J Button-Shafer, RN Cahn, E Charles, CT Day, MS Gill, AV Gritsan, Y Groysman, RG Jacobsen, RW Kadel, J Kadyk, LT Kerth, Yu G Kolomensky, G Kukartsev, G Lynch, LM Mir, PJ Oddone, TJ Orimoto, M Pripstein, NA Roe, MT Ronan, WA Wenzel, M Barrett, KE Ford, TJ Harrison, AJ Hart, CM Hawkes, SE Morgan, AT Watson, M Fritsch, K Goetzen, T Held, H Koch, B Lewandowski, M Pelizaeus, K Peters, T Schroeder, M Steinke, JT Boyd, JP Burke, N Chevalier, WN Cottingham, MP Kelly, T Cuhadar-Donszelmann, BG Fulsom, C Hearty, NS Knecht, TS Mattison, JA McKenna, A Khan, P Kyberd, M Saleem, L Teodorescu, AE Blinov, VE Blinov, AD Bukin, VP Druzhinin, VB Golubev, EA Kravchenko, AP Onuchin, SI Serednyakov, Yu I Skovpen, EP Solodov, AN Yushkov, D Best, M Bondioli, M Bruinsma, M Chao, I Eschrich, D Kirkby, AJ Lankford, M Mandelkern, RK Mommsen, W Roethel, DP Stoker, C Buchanan, BL Hartfiel, SD Foulkes, JW Gary, O Long, BC Shen, K Wang, L Zhang, D del Re, HK Hadavand, EJ Hill, DB Macfarlane, HP Paar, S Rahatlou, V Sharma, JW Berryhill, C Campagnari, A Cunha, B Dahmes, TM Hong, MA Mazur, JD Richman, W Verkerke, TW Beck, AM Eisner, CJ Flacco, CA Heusch, J Kroseberg, WS Lockman, G Nesom, T Schalk, A Schumm, A Seiden, P Spradlin, DC Williams, MG Wilson, J Albert, E Chen, GP Dubois-Felsmann, A Dvoretskii, DG Hitlin, I Narsky, T Piatenko, FC Porter, A Ryd, A Samuel, R Andreassen, S Jayatilleke, G Mancinelli, BT Meadows, MD Sokoloff, F Blanc, P Bloom, S Chen, WT Ford, U Nauenberg, A Olivas, P Rankin, WO Ruddick, JG Smith, KA Ulmer, SR Wagner, J Zhang, A Chen, EA Eckhart, A Soffer, WH Toki, RJ Wilson, Q Zeng, D Altenburg, E Feltresi, A Hauke, B Spaan, T Brandt, J Brose, M Dickopp, V Klose, HM Lacker, R Nogowski, S Otto, A Petzold, G Schott, J Schubert, KR Schubert, R Schwierz, JE Sundermann, D Bernard, GR Bonneaud, P Grenier, S Schrenk, Ch Thiebaux, G Vasileiadis, M Verderi, DJ Bard, PJ Clark, W Gradl, F Muheim, S Playfer, Y Xie, M Andreotti, V Azzolini, D Bettoni, C Bozzi, R Calabrese, G Cibinetto, E Luppi, M Negrini, L Piemontese, F Anulli, R Baldini-Ferroli, A Calcaterra, R De Sangro, G Finocchiaro, P Patteri, IM Peruzzi, M Piccolo, A Zallo, A Buzzo, R Capra, R Contri, M Lo Vetere, M Macri, MR Monge, S Passaggio, C Patrignani, E Robutti, A Santroni, S Tosi, S Bailey, G Brandenburg, KS Chaisanguanthum, M Morii, E Won, J Wu, RS Dubitzky, U Langenegger, J Marks, S Schenk, U Uwer, W Bhimji, DA Bowerman, PD Dauncey, U Egede, RL Flack, JR Gaillard, GW Morton, JA Nash, MB Nikolich, GP Taylor, WP Vazquez, MJ Charles, WF Mader, U Mallik, AK Mohapata, J Cochran, HB Crawley, V Eyges, WT Meyer, S Prell, EI Rosenberg, AE Rubin, J Yi, N Arnaud, M Davier, X Giroux, G Grosdidier, A Hocker, F Le Diberder, V Lepeltier, AM Lutz, A Oyanguren, TC Petersen, M Pierini, S Plaszcynski, S Rodier, P Roudeau, MH Schune, A Stocchi, G Wormser, CH Cheng, DJ Lange, MC Simani, DM Wright, AJ Bevan, CA Chavez, JP Coleman, IJ Forster, JR Fry, E Gabathuler, R Gamet, KA George, DE Hutchcroft, RJ Parry, DJ Payne, KC Schofield, C Touramanis, CM Cormack, F Di Lodovico, R Sacco, CL Brown, G Cowan, HU Flaecher, MG Green, DA Hopkins, PS Jackson, TR McMahon, S Ricciardi, F Salvatore, D Brown, CL Davis, J Allison, NR Barlow, RJ Barlow, MC Hodgkinson, GD Lafferty, MT Naisbit, JC Williams, C Chen, A Farbin, WD Hulsbergen, A Jawahery, D Kovalskyi, CK Lae, V Lillard, DA Roberts, G Simi, G Blaylock, C Dallapiccola, SS Hertzbach, R Kofler, VB Koptchev, X Li, TB Moore, S Saremi, H Staengle, S Willocq, R Cowan, K Koeneke, G Sciolla, SJ Sekula, M Spitznagel, F Taylor, RK Yamamoto, H Kim, PM Patel, SH Robertson, A Lazzaro, V Lombardo, F Palombo, JM Bauer, L Cremaldi, V Eschenburg, R Godang, R Kroeger, J Reidy, DA Sanders, DJ Summers, HW Zhao, S Brunet, D Cote, P Taras, B Viaud, H Nicholson, N Cavallo, G De Nardo, F Fabozzi, C Gatto, L Lista, D Monorchio, P Paolucci, D Piccolo, C Sciacca, M Baak, H Bulten, G Raven, HL Snoek, L Wilden, CP Jessop, JM LoSecco, T Allmendinger, G Benelli, KK Gan, K Honscheid, D Hufnagel, PD Jackson, H Kagan, R Kass, T Pulliam, AM Rahimi, R Ter-Antonyan, QK Wong, J Brau, R Frey, O Igonkina, M Lu, CT Potter, NB Sinev, D Strom, J Strube, E Torrence, A Dorigo, F Galeazzi, M Margoni, M Morandin, M Posocco, M Rotondo, F Simonetto, R Stroili, C Voci, M Benayoun, H Briand, J Chauveau, P David, L Del Buono, Ch de la Vaissiere, O Hamon, MJJ John, Ph Leruste, J Malcles, J Ocariz, L Roos, G Therin, PK Behera, L Gladney, QH Guo, J Panetta, M Biasini, R Covarelli, S Pacetti, M Pioppi, C Angelini, G Batignani, S Bettarini, F Bucci, G Calderini, M Carpinelli, R Cenci, F Forti, MA Giorgi, A Lusiani, G Marchiori, M Morganti, N Neri, E Paoloni, M Rama, G Rizzo, J Walsh, M Haire, D Judd, DE Wagoner, J Biesiada, N Danielson, P Elmer, YP Lau, C Lu, J Olsen, AJS Smith, AV Telnov, F Bellini, G Cavoto, A D'Orazio, E Di Marco, R Faccini, F Ferrarotto, F Ferroni, M Gaspero, L Li Gioi, MA Mazzoni, S Morganti, G Piredda, F Polci, F Safai Tehrani, C Voena, H Schroder, G Wagner, R Waldi, T Adye, N De Groot, B Franek, GP Gopal, EO Olaiya, FF Wilson, R Aleksan, S Emery, A Gaidot, SF Ganzhur, P-F Giraud, G Graziani, G Hamel de Monchenault, W Kozanecki, M Legendre, GW London, B Mayer, G Vasseur, Ch Yeche, M Zito, MV Purohit, W Weidemann, JR Wilson, FX Yumiceva, T Abe, MT Allen, D Aston, R Bartoldus, N Berger, AM Boyarski, OL Buchmueller, R Claus, MR Convery, M Cristinziani, JC Dingfelder, D Dong, J Dorfan, D Dujmic, W Dunwoodie, S Fan, RC Field, T Glanzman, SJ Gowdy, T Hadig, V Halyo, C Hast, T Hryn'ova, WR Innes, MH Kelsey, P Kim, ML Kocian, DWGS Leith, J Libby, S Luitz, V Luth, HL Lynch, H Marsiske, R Messner, DR Muller, CP O'Grady, VE Ozcan, A Perazzo, M Perl, BN Ratcliff, A Roodman, AA Salnikov, RH Schindler, J Schwiening, A Snyder, J Stelzer, D Su, MK Sullivan, K Suzuki, S Swain, JM Thompson, J Va'vra, M Weaver, AJR Weinstein, WJ Wisniewski, M Wittgen, DH Wright, AK Yarritu, K Yi, CC Young, PR Burchat, AJ Edwards, SA Majewski, BA Petersen, C Roat, M Ahmed, S Ahmed, MS Alam, JA Ernst, MA Saeed, FR Wappler, SB Zain, W Bugg, M Krishnamurthy, SM Spanier, R Eckmann, JL Ritchie, A Satpathy, RF Schwitters, JM Izen, I Kitayama, XC Lou, S Ye, F Bianchi, M Bona, F Gallo, D Gamba, M Bomben, L Bosisio, C Cartaro, F Cossutti, G Della Ricca, S Dittongo, S Grancagnolo, L Lanceri, L Vitale, F Martinez-Vidal, RS Pavini, Sw Banerjee, B Bhuyan, CM Brown, D Fortin, K Hamano, R Kowalewski, JM Roney, RJ Sobie, JJ Back, PF Harrison, TE Latham, GB Mohanty, HR Band, X Chen, B Cheng, S Dasu, M Datta, AM Eichenbaum, KT Flood, JJ Hollar, JR Johnson, PE Kutter, H Li, R Liu, B Mellado, A Mihalyi, Y Pan, R Prepost, P Tan, JH Von Wimmersperg-Toeller, SL Wu, Z Yu, H Neal

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Malcolm John

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Preliminary results using Timepix as a particle tracking detector

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Abstract:

Synchrotron tests of 3D Medipix2 and TimePix X-Ray Detectors

Authors:

Abstract:

The LHCb detector at the LHC

Authors:

Abstract:

Performance of the LHCb vertex detector alignment algorithm determined with beam test data

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Measurement of branching fractions and mass spectra of B → Kππγ (vol 98, art no 211804, 2007)

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Malcolm John

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Preliminary results using Timepix as a particle tracking detector

Authors:

Abstract:

Synchrotron tests of 3D Medipix2 and TimePix X-Ray Detectors

Authors:

Abstract:

The LHCb detector at the LHC

Authors:

Abstract:

Performance of the LHCb vertex detector alignment algorithm determined with beam test data

Authors:

Measurement of branching fractions and mass spectra of B → Kππγ (vol 98, art no 211804, 2007)

Authors: