تقرير
Monitoring of the thermal neutron flux in the LSM underground laboratory
| العنوان: | Monitoring of the thermal neutron flux in the LSM underground laboratory |
|---|---|
| المؤلفون: | Rozov, S., Armengaud, E., Augier, C., Bergé, L., Benoit, A., Besida, O., Blümer, J., Broniatowski, A., Brudanin, V., Chantelauze, A., Chapellier, M., Chardin, G., Charlieux, F., Collin, S., Crauste, O., De Jesus, M., Defay, X., Di Stefano, P., Dolgorouki, Y., Domange, J., Dumoulin, L., Eitel, K., Filosofov, D., Gascon, J., Gerbier, G., Gros, M., Hannawald, M., Juillard, A., Kluck, H., Kozlov, V., Lemrani, R., Lubashevskiy, A., Marrach, C., Marnieros, S., Navick, X-F., Nones, C., Olivieri, E., Pari, P., Paul, B., Sanglard, V., Scorza, S., Semikh, S., Verdier, M-A., Vagneron, L., Yakushev, E. |
| سنة النشر: | 2010 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - Instrumentation and Methods for Astrophysics |
| الوصف: | This paper describes precise measurements of the thermal neutron flux in the LSM underground laboratory in proximity of the EDELWEISS-II dark matter search experiment together with short measurements at various other locations. Monitoring of the flux of thermal neutrons is accomplished using a mobile detection system with low background proportional counter filled with $^3$He. On average 75 neutrons per day are detected with a background level below 1 count per day (cpd). This provides a unique possibility of a day by day study of variations of the neutron field in a deep underground site. The measured average 4$\pi$ neutron flux per cm$^{2}$ in the proximity of EDELWEISS-II is $\Phi_{MB}=3.57\pm0.05^{stat}\pm0.27^{syst}\times 10^{-6}$ neutrons/sec. We report the first experimental observation that the point-to-point thermal neutron flux at LSM varies by more than a factor two. Comment: submitted to Journal of Physics G: Nuclear and Particle Physics, 8 pages, 4 figures |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/1001.4383 |
| رقم الأكسشن: | edsarx.1001.4383 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |