The x-ray mirror telescope and the pn-CCD detector of CAST

A hollow pressure vessel is provided and includes an upwardly opening filler neck supported from an upper portion thereof and a removable fluid pressure sealing closure is carried by the filler neck. A liquid outlet tube opens upwardly through an upper portion of the vessel from the interior thereof in sealed engagement with the upper vessel portion. The lower end of the tube opens outwardly within a lower portion of the vessel and a flexible pressure hose has one end connected to the upper end of the tube outwardly of the pressure vessel. A tubular spray wand has one end connected to the other end of the hose and the spray wand includes a discharge spray head on the other end thereof. In addition, the spray wand includes a control valve therefor intermediate the opposite ends of the wand for controlling the flow of liquid through the wand and a motorized compressor is mounted on an upper portion of the vessel and includes a compressed air outlet opening into the interior of the vessel in sealed engagement therewith. The compressed air outlet opens into the interior of the filler neck below the removable closure thereof and the latter includes an exterior pressure gauge opening into the interior of the neck through the closure. Further, the neck includes a manually openable and closable vent valve diametrically opposite the compressed air outlet opening into the interior of the filler neck.