Search Results - "Von Gunten, H."

200-Year Record of Metals in Lake Sediments and Natural Background Concentrations by von Gunten, H. R, Sturm, M, Moser, R. N

“…Lake sediments conserve important information about past conditions of a lake and its environments. We present analyses of calcium, manganese, iron, copper,…”
Get full text

A G-APD based Camera for Imaging Atmospheric Cherenkov Telescopes by Anderhub, H., Backes, M., Biland, A., Boller, A., Braun, I., Bretz, T., Commichau, S., Commichau, V., Dorner, D., Gendotti, A., Grimm, O., von Gunten, H., Hildebrand, D., Horisberger, U., Köhne, J.-H., Krähenbühl, T., Kranich, D., Lorenz, E., Lustermann, W., Mannheim, K., Neise, D., Pauss, F., Renker, D., Rhode, W., Rissi, M., Ribordy, M., Röser, U., Stark, L.S., Stucki, J.-P., Tibolla, O., Viertel, G., Vogler, P., Weitzel, Q.

“…Imaging Atmospheric Cherenkov Telescopes (IACT) for Gamma-ray astronomy are presently using photomultiplier tubes as photo sensors. Geiger-mode avalanche…”
Get full text

Uranium Series Disequilibrium and High Thorium and Radium Enrichments in Karst Formations by von Gunten, H. R, Surbeck, H, Rössler, E

“…We found, in limestone Karst soils of the Jura Mountains and of the mountains in the central part of Switzerland, an enrichment up to a factor 20 of 230Th and…”
Get full text

Time resolution of a photomultiplier readout system for space application by Commichau, S.C., Camps, C., Capell, M., Commichau, V., Flügge, G., Hangarter, K., Lebedev, A., Röser, U., von Gunten, H., Mnich, J., Viertel, G.M.

“…The performance of a readout system for the Synchrotron Radiation Detector (SRD) is studied. The detector is proposed as part of the Alpha Magnetic…”
Get full text

FACT—The first Cherenkov telescope using a G-APD camera for TeV gamma-ray astronomy by Anderhub, H., Backes, M., Biland, A., Boller, A., Braun, I., Bretz, T., Commichau, S., Commichau, V., Domke, M., Dorner, D., Gendotti, A., Grimm, O., von Gunten, H., Hildebrand, D., Horisberger, U., Köhne, J.-H., Krähenbühl, T., Kranich, D., Krumm, B., Lorenz, E., Lustermann, W., Mannheim, K., Neise, D., Pauss, F., Renker, D., Rhode, W., Rissi, M., Ribordy, M., Röser, U., Stark, L.S., Stucki, J.-P., Tibolla, O., Viertel, G., Vogler, P., Warda, K., Weitzel, Q.

“…Geiger-mode Avalanche Photodiodes (G-APD) bear the potential to significantly improve the sensitivity of Imaging Air Cherenkov Telescopes (IACT). We are…”
Get full text

Results of the prototype camera for FACT by Anderhub, H., Backes, M., Biland, A., Boller, A., Braun, I., Bretz, T., Commichau, S., Commichau, V., Dorner, D., Gendotti, A., Grimm, O., von Gunten, H., Hildebrand, D., Horisberger, U., Köhne, J.-H., Krähenbühl, T., Kranich, D., Lorenz, E., Lustermann, W., Mannheim, K., Neise, D., Pauss, F., Renker, D., Rhode, W., Rissi, M., Ribordy, M., Röser, U., Stark, L.S., Stucki, J.-P., Tibolla, O., Viertel, G., Vogler, P., Weitzel, Q.

“…The maximization of the photon detection efficiency (PDE) is a key issue in the development of cameras for Imaging Atmospheric Cherenkov Telescopes…”
Get full text

Experience with the L3 vertex drift chamber at LEP by Anderhub, H., Beissel, F., Betev, B., Biland, A., Böhm, A., Bourilkov, D., Camps, C., Commichau, V., Djambazov, L., Göttlicher, P., Hangarter, K., Hofer, H., Holzner, A., Horisberger, U., Kopp, A., Leiste, R., Lohmann, W., Lustermann, W., Mnich, J., Paus, C., Pohl, M., Rahal, G., Röser, U., Sassowsky, M., Schäfer, C., Schmidt-Kärst, A.S., Schmitz, P., Spickermann, T., Straessner, A., Suter, H., Szczesny, H., Viertel, G., Vogt, H., Von Gunten, H.P., Waldmeier, S., Weber, M., Wienemann, P.

“…The vertex drift chamber of the L3 Experiment at LEP, based on the time expansion principle, was in operation from the start-up of LEP in 1989 until the…”
Get full text

Decreased metal concentrations in ground water caused by controls of phosphate emissions by von Gunten, H. R, Lienert, Ch

“…An analysis of the phosphate, manganese and cadmium in the river Glatt in Switzerland revealed lower groundwater concentrations of cadmium, manganese and…”
Get full text

FACT - The G-APD revolution in Cherenkov astronomy by Bretz, T., Anderhub, H., Backes, M., Biland, A., Boccone, V., Braun, I., Buss, J., Cadoux, F., Commichau, V., Djambazov, L., Dorner, D., Einecke, S., Eisenacher, D., Gendotti, A., Grimm, O., von Gunten, H., Haller, C., Hempfling, C., Hildebrand, D., Horisberger, U., Huber, B., Kim, K.-S, Knoetig, M. L., Kohne, J.-H, Krahenbuhl, T., Krumm, B., Lee, M., Lorenz, E., Lustermann, W., Lyard, E., Mannheim, K., Meharga, M., Meier, K., Muller, S., Montaruli, T., Neise, D., Nessi-Tedaldi, F., Overkemping, A.-K, Paravac, A., Pauss, F., Renker, D., Rhode, W., Ribordy, M., Roser, U., Stucki, J.-P, Schneider, J., Steinbring, T., Temme, F., Thaele, J., Tobler, S., Viertel, G., Vogler, P., Walter, R., Warda, K., Weitzel, Q., Zanglein, M.

“…Since two years, the FACT telescope is operating on the Canary Island of La Palma. Apart from its purpose to serve as a monitoring facility for the brightest…”
Get full text

A channel photomultiplier with a scintillator faceplate by Grimm, O, Kim, G.N, Lee, M.W, Röser, U, Viertel, G.M, von Gunten, H

“…A channel photomultiplier has been constructed using a YAP(Ce) scintillator as an entrance window. First results of performance measurements show a significant…”
Get full text

Infiltration of inorganic compounds from the Glatt River, Switzerland, into a groundwater aquifer by VON GUNTEN, H. R, KULL, T. P

“…Sodium, potassium, calcium, magnesium, strontium, chromium, copper, zinc, cadmium and lead, together with chloride, nitrate, sulphate and phosphate anions,…”
Get full text

Design and construction of the prototype synchrotron radiation detector by Anderhub, H, Bates, J.R, Bätzner, D, Baumgartner, S, Biland, A, Camps, C, Capell, M, Commichau, V, Djambazov, L, Fanchiang, Y.-J, Flügge, G, Fritschi, M, Grimm, O, Hangarter, K, Hofer, H, Horisberger, U, Kan, R, Kästli, W, Kenney, G.P, Kim, G.N, Kim, K.S, Koutsenko, V, Kräber, M, Kuipers, J, Lebedev, A, Lee, M.W, Lee, S.-C, Lewis, R, Lustermann, W, Pauss, F, Rauber, T, Ren, D, Ren, Z.L, Röser, U, Son, D, Ting, Samuel C.C, Tiwari, A.N, Viertel, G.M, von Gunten, H, Wicki, S.Waldmeier, Wang, T.-S, Yang, J, Zimmermann, B

“…The Prototype Synchrotron Radiation Detector (PSRD) is a small-scale experiment designed to measure the rate of low-energy charged particles and photons in…”
Get full text

Calibration and performance of the photon sensor response of FACT -- The First G-APD Cherenkov telescope by Biland, A, Bretz, T, Buß, J, Commichau, V, Djambazov, L, Dorner, D, Einecke, S, Eisenacher, D, Freiwald, J, Grimm, O, von Gunten, H, Haller, C, Hempfling, C, Hildebrand, D, Hughes, G, Horisberger, U, Knoetig, M. L, Krähenbühl, T, Lustermann, W, Lyard, E, Mannheim, K, Meier, K, Mueller, S, Neise, D, Overkemping, A. -K, Paravac, A, Pauss, F, Rhode, W, Röser, U, Stucki, J. -P, Steinbring, T, Temme, F, Thaele, J, Vogler, P, Walter, R, Weitzel, Q

“…2014 JINST 9 P10012 The First G-APD Cherenkov Telescope (FACT) is the first in-operation test of the performance of silicon photo detectors in Cherenkov…”
Get full text

Performance of a cerium fluoride crystal matrix measured in high-energy particle beams by Auffray, E., Beckers, T., Bourotte, J., Chipaux, R., Commichau, V., Dafinei, I., Depasse, P., Djambazov, L., Dydak, U., El Mamouni, H., Fay, J., Felcini, M., Goyot, M., Haguenauer, M., Hangarter, K., Hillemanns, H., Hofer, H., Ille, B., Jacobs, B., Kirn, T., Kryn, D., Lebrun, P., Lecomte, P., Lecoq, P., Martin, J.P., Mattioli, M., Maurelli, G., Melnikov, I., Nessi-Tedaldi, F., Pacciani, L., Pirro, S., Raghavan, R., Ren, D., Reynaud, M., Röser, U., Sahuc, P., Schmitz, D., Schneegans, M., Schwenke, J., Soric, I., Viertel, G., Von Gunten, H.P., Walder, J.P., Waldmeier-Wicki, S.

“…A cerium fluoride matrix composed of nine longitudinally segmented towers, approximately 25 X 0 long, has been tested in electron, muon and pion beams of…”
Get full text

FACT -- Operation of the First G-APD Cherenkov Telescope by Bretz, T, Biland, A, Buß, J, Commichau, V, Djambazov, L, Dorner, D, Einecke, S, Eisenacher, D, Freiwald, J, Grimm, O, von Gunten, H, Haller, C, Hempfling, C, Hildebrand, D, Hughes, G, Horisberger, U, Knoetig, M. L, Krähenbühl, T, Lustermann, W, Lyard, E, Mannheim, K, Meier, K, Mueller, S, Neise, D, Overkemping, A. -K, Paravac, A, Pauss, F, Rhode, W, Röser, U, Stucki, J. -P, Steinbring, T, Temme, F, Thaele, J, Vogler, P, Walter, R, Weitzel, Q

“…Since more than two years, the First G-APD Cherenkov Telescope (FACT) is operating successfully at the Canary Island of La Palma. Apart from its purpose to…”
Get full text

The Prototype Synchrotron Radiation Detector (PSRD) by Anderhub, H, Baetzner, D, Baumgartner, S, Biland, A, Camps, C, Capell, M, Commichau, V, Djambazov, L, Fanchiang, Y.-J, Fluegge, G, Grimm, O, Hangarter, K, Hofer, H, Kan, R, Kenney, G, Koutsenko, V, Kraeber, M, Kuipers, J, Lebedev, A, Lee, S.-C, Ren, D, Ren, Z.L, Roeser, U, Ting, Samuel C.C, Tiwari, A, Viertel, G.M, von Gunten, H.P, Waldmeier Wicki, S, Wang, T.-S, Zimmermann, B

“…The components of the PSRD, a detector to study the flux of X-rays and charged particles in the keV–MeV energy range in outer space, are described. The device…”
Get full text

Design and Operation of FACT -- The First G-APD Cherenkov Telescope by Anderhub, H, Backes, M, Biland, A, Boccone, V, Braun, I, Bretz, T, Buß, J, Cadoux, F, Commichau, V, Djambazov, L, Dorner, D, Einecke, S, Eisenacher, D, Gendotti, A, Grimm, O, von Gunten, H, Haller, C, Hildebrand, D, Horisberger, U, Huber, B, Kim, K. -S, Knoetig, M. L, K"ohne, J. H, Kr"ahenb"uhl, T, Krumm, B, Lee, M, Lorenz, E, Lustermann, W, Lyard, E, Mannheim, K, Meharga, M, Meier, K, Montaruli, T, Neise, D, Nessi-Tedaldi, F, Overkemping, A. -K, Paravac, A, Pauss, F, Renker, D, Rhode, W, Ribordy, M, R"oser, U, Stucki, J. -P, Schneider, J, Steinbring, T, Temme, F, Thaele, J, Tobler, S, Viertel, G, Vogler, P, Walter, R, Warda, K, Weitzel, Q, Z"anglein, M

“…2013 JINST 8 P06008 The First G-APD Cherenkov Telescope (FACT) is designed to detect cosmic gamma-rays with energies from several hundred GeV up to about 10…”
Get full text

Radon-222 as a groundwater tracer. A laboratory study by Hoehn, Eduard, Von Gunten, Hans R, Stauffer, Fritz, Dracos, Themistocles

“…In a laboratory study, radon-222 was used for determining residence times and velocities of water flowing through an open-topped sand box. Results showed that…”
Get full text

G-APDs in Cherenkov astronomy: The FACT camera by Krähenbühl, T., Anderhub, H., Backes, M., Biland, A., Boller, A., Braun, I., Bretz, T., Commichau, V., Djambazov, L., Dorner, D., Farnier, C., Gendotti, A., Grimm, O., von Gunten, H., Hildebrand, D., Horisberger, U., Huber, B., Kim, K.-S., Köhne, J.-H., Krumm, B., Lee, M., Lenain, J.-P., Lorenz, E., Lustermann, W., Lyard, E., Mannheim, K., Meharga, M., Neise, D., Nessi-Tedaldi, F., Overkemping, A.-K., Pauss, F., Renker, D., Rhode, W., Ribordy, M., Rohlfs, R., Röser, U., Stucki, J.-P., Schneider, J., Thaele, J., Tibolla, O., Viertel, G., Vogler, P., Walter, R., Warda, K., Weitzel, Q.

“…Geiger-mode avalanche photodiodes (G-APD, SiPM) are a much discussed alternative to photomultiplier tubes in Cherenkov astronomy. The First G-APD Cherenkov…”
Get full text

A novel camera type for very high energy gamma-ray astronomy based on Geiger-mode avalanche photodiodes by Anderhub, H, Backes, M, Biland, A, Boller, A, Braun, I, Bretz, T, Commichau, S, Commichau, V, Dorner, D, Gendotti, A, Grimm, O, von Gunten, H, Hildebrand, D, Horisberger, U, Krähenbühl, T, Kranich, D, Lorenz, E, Lustermann, W, Mannheim, K, Neise, D, Pauss, F, Renker, D, Rhode, W, Rissi, M, Röser, U, Rollke, S, Stark, L. S, Stucki, J. -P, Viertel, G, Vogler, P, Weitzel, Q

“…JINST 4:P10010, 2009 Geiger-mode avalanche photodiodes (G-APD) are promising new sensors for light detection in atmospheric Cherenkov telescopes. In this…”
Get full text