Forward Instrumentation for ILC Detectors

Abramowicz, H.; Henschel, H.; Takubo, Y.; Schuwalow, S.; Orlandea, M.; Smiljanic, I.; Abusleme, A.; Aguilar, J.; Haller, G.; Sailer, A.; Dragone, A.; Lohmann, W.; Kotula, J.; Sadeh, I.; Olshevski, A.; Afanaciev, K.; Gostkin, M.; Bergholz, M.; Daniluk, W.; Levy, A.; Nauenberg, U.; Novgorodova, O.; Oliwa, K.; Zhang, J.; Grzelak, G.; Ito, K.; Oleinik, G.; Coca, C.; Fiutowski, T.; Teodorescu, E.; Schmidt, R.; Emeliantchik, I.; Castro, E.; Lange, W.; Yamamoto, H.; Chelkov, G.; Wierba, W.; Zawiejski, L.; Kielar, E.; Ignatenko, A.; Idzik, M.; Elsener, K.; Ohlerich, M.; Kulis, S.; Jovin, T.; Ambalathankandy, P.; Moszczynski, A.; Bozovic-Jelisavcic, I.; Swientek, K.; Dumitru, L.; Pawlik, B.; Schumm, B.; Krumstein, Z.; Sato, Y.; Przyborowski, D.; Bambade, P.; Pandurovic, M.; Grah, C.

doi:10.1088/1748-0221/5/12/P12002

Article
Report number	arXiv:1009.2433 ; DESY-10-142
Title	Forward Instrumentation for ILC Detectors
Author(s)	Abramowicz, H. (Tel Aviv U.) ; Abusleme, A. (Stanford U., Phys. Dept.) ; Afanaciev, K. (Minsk, NCPHEP) ; Aguilar, J. (AGH-UST, Cracow) ; Ambalathankandy, P. (AGH-UST, Cracow) ; Bambade, P. (Orsay, LAL) ; Bergholz, M. (DESY, Zeuthen ; Brandenburg Tech. U.) ; Bozovic-Jelisavcic, I. (Belgrade U.) ; Castro, E. (DESY, Zeuthen) ; Chelkov, G. (Dubna, JINR) ; Coca, C. (Bucharest, IFIN-HH) ; Daniluk, W. (Cracow, INP) ; Dragone, A. (SLAC) ; Dumitru, L. (Bucharest, IFIN-HH) ; Elsener, K. (CERN) ; Emeliantchik, I. (Minsk, NCPHEP) ; Fiutowski, T. (AGH-UST, Cracow) ; Gostkin, M. (Dubna, JINR) ; Grah, C. (DESY, Zeuthen) ; Grzelak, G. (Cracow, INP ; Warsaw U.) ; Haller, G. (SLAC) ; Henschel, H. (DESY, Zeuthen) ; Ignatenko, A. (Minsk, NCPHEP) ; Idzik, M. (AGH-UST, Cracow) ; Ito, K. (Tohoku U.) ; Jovin, T. (Belgrade U.) ; Kielar, E. (Cracow, INP) ; Kotula, J. (Cracow, INP) ; Krumstein, Z. (Dubna, JINR) ; Kulis, S. (AGH-UST, Cracow) ; Lange, W. (DESY, Zeuthen) ; Lohmann, W. (DESY, Zeuthen ; Brandenburg Tech. U.) ; Levy, A. (Tel Aviv U.) ; Moszczynski, A. (Cracow, INP) ; Nauenberg, U. (Colorado U.) ; Novgorodova, O. (DESY, Zeuthen ; Brandenburg Tech. U.) ; Ohlerich, M. (DESY, Zeuthen ; Brandenburg Tech. U.) ; Orlandea, M. (Bucharest, IFIN-HH) ; Oleinik, G. (Colorado U.) ; Oliwa, K. (Cracow, INP) ; Olshevski, A. (Dubna, JINR) ; Pandurovic, M. (Belgrade U.) ; Pawlik, B. (Cracow, INP) ; Przyborowski, D. (AGH-UST, Cracow) ; Sato, Y. (Tohoku U.) ; Sadeh, I. (Tel Aviv U.) ; Sailer, A. (CERN) ; Schmidt, R. (DESY, Zeuthen ; Brandenburg Tech. U.) ; Schumm, B. (UC, Santa Cruz) ; Schuwalow, S. (DESY, Zeuthen) ; Smiljanic, I. (Belgrade U.) ; Swientek, K. (AGH-UST, Cracow) ; Takubo, Y. (Tohoku U.) ; Teodorescu, E. (Bucharest, IFIN-HH) ; Wierba, W. (Cracow, INP) ; Yamamoto, H. (Tohoku U.) ; Zawiejski, L. (Cracow, INP) ; Zhang, J. (Argonne)
Publication	2010
Imprint	14 Sep 2010
Number of pages	30
Note	Comments: 28 pages, 28 figures
In:	JINST 5 (2010) P12002
DOI	10.1088/1748-0221/5/12/P12002
Subject category	Detectors and Experimental Techniques
Accelerator/Facility, Experiment	ILC
Abstract	Two special calorimeters are foreseen for the instrumentation of the very forward region of the ILC detector, a luminometer designed to measure the rate of low angle Bhabha scattering events with a precision better than 10-3 and a low polar angle calorimeter, adjacent to the beam-pipe. The latter will be hit by a large amount of beamstrahlung remnants. The amount and shape of these depositions will allow a fast luminosity estimate and the determination of beam parameters. The sensors of this calorimeter must be radiation hard. Both devices will improve the hermeticity of the detector in the search for new particles. Finely segmented and very compact calorimeters will match the requirements. Due to the high occupancy fast front-end electronics is needed. The design of the calorimeters developed and optimised with Monte Carlo simulations is presented. Sensors and readout electronics ASICs have been designed and prototypes are available. Results on the performance of these major components are summarised.
Copyright/License	Publication: (License: CC-BY-3.0)

$: \Subref{fig:bhabhaXSFIG1} Dependence of $d\sigma_{\mathrm{B}}/d\theta$, the differential Bhabha cross-section, on the polar angle, $\theta$, at $\sqrt{s}=500$~GeV. The dashed lines mark the fiducial volume of LumiCal, $41<\theta^{f}<67$~mrad. \Subref{fig:bhabhaXSFIG2} Dependence of the statistical uncertainty in counting the number of Bhabha events, $(\Delta \sf{L} / \sf{L})_{stat}$, on the minimal polar angle of the fiducial volume, $\theta_{\rm{min}}$, while the upper limit is kept at 67 mrad. An integrated luminosity of 500 fb$^{-1}$ is assumed. : : Caption not extracted$ Show more plots

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