Operation of a Liquid Argon Time Projection Chamber
For the first time, the operation of a three-dimensional liquid argon time projection chamber has been demonstrated. This was accomplished in a 50 liter test detector using a readout plane with a woven structure etched on a PC-board.
Drift Collection Calorimetry Using a Combined Radiator and Field Shaping Structure of Lead Glass Tubing
A design for a drift collection calorimeter having a combined radiator and electric field shaping structure made of fused lead glass tubing is described. Reduction of a surface layer of lead oxide in a hydrogen oven is used to form a high resistance metallic layer on the interior of the tubes. This layer is used as a continuous voltage divider for drift field shaping. The EGS shower Monte Carlo code was used to model the performance of the proposed calorimeter. The effects of choice of the tube geometry, gas pressure and sampling scheme (digital vs. conventional) are discussed. The possibility of using this type of radiator/drift field structure in liquid argon is briefly considered.
Tourism in the Amazon: identifying challenges and finding solutions
Purpose – The purpose of this paper is to provide an overview of the tourism sector in the Amazon regions of Bolivia, Brazil, Colombia, Ecuador, Guyana, Peru, and Suriname and then discuss the manner in which tourism activity assists the protection of the Amazon rainforests. The paper also describes the manner in which the first World Hospitality and Tourism Themes Roundtable on Tourism in the Amazon is organized in 2009.Design/methodology/approach – Teams of researchers from the Ministries of Tourism, the private sector and academia in the Member Countries of Treaty for Amazon Cooperation collaborated to address, in ten‐page papers, the question “Does sustainable tourism offer solutions for the protection of the Amazon rainforest?”Findings – The paper provides valuable information on the current state of tourism policy and practice in the Amazon Member Countries. It also articulates the challenges that attend the development of sustainable tourism as a mechanism for the protection of the Amazon.Practical...