EXPERIMENTO LAGO CHACALTAYA 2013
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Revista Boliviana de Física
Abstract
Se inicia otra etapa del experimento LAGO (Large Aperture Gamma Ray Burst Observatory) desde septiembre de 2012, con una implementación electrónica moderna consistente de dos tarjetas: una ADC de tres canales, y otra FPGA (Nexys2) que lee las señales cada 25 ns. Este nuevo equipo es compacto; se probó la funcionalidad y se recalibraron los detectores del experimento. El software ofrece mayores bondades, gracias a los cuales se optó por registrar cuentas cada 5 ms para 7 umbrales por canal; además se observa cuentas de coincidencias entre los tres canales. Se presentan los resultados actuales de la variación temporal de los tres detectores Cherenkov que están operando desde 2009 en la montaña de Chacaltaya (La Paz, Bolivia), así como la valoración de este equipo. Actualmente las cuentas diarias y mensuales pueden ser observadas en internet. Se ha visto que las variaciones diarias están en correlación con las variaciones de presión; se observa asimismo la disminución de Forbush de la actividad solar
Another stage of the LAGO (Large Aperture Gamma Ray Burst Observatory) experiment starts since September 2012, with modern electronic implementation consisting of two cards: one three-channel ADC, and other FPGA (Nexys2) that reads signals each 25 ns. This new device is compact; it has been tested for functionality and the detectors of the experiment were recalibrated. Due to the greater benefits of the sowtware, we could register counts every 5 ms for 7 thresholds per channel; count coincidences were observed among the three channels. We present the current results of the time variation of the three Cherenkov detectors operating since 2009 in the Chacaltaya mountain (La Paz, Bolivia), as well as the valuation of this equipment. The daily and monthly counts can be consulted online via internet. We have observed that the daily variations are correlated with variations in pressure and with the Forbush decrease in the solar activity
Another stage of the LAGO (Large Aperture Gamma Ray Burst Observatory) experiment starts since September 2012, with modern electronic implementation consisting of two cards: one three-channel ADC, and other FPGA (Nexys2) that reads signals each 25 ns. This new device is compact; it has been tested for functionality and the detectors of the experiment were recalibrated. Due to the greater benefits of the sowtware, we could register counts every 5 ms for 7 thresholds per channel; count coincidences were observed among the three channels. We present the current results of the time variation of the three Cherenkov detectors operating since 2009 in the Chacaltaya mountain (La Paz, Bolivia), as well as the valuation of this equipment. The daily and monthly counts can be consulted online via internet. We have observed that the daily variations are correlated with variations in pressure and with the Forbush decrease in the solar activity
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Vol. 24, No. 24