GLP Planar, HPGe Low-Energy Photon Spectrometer
12Pages

GLP Series Planar HPGe Low-Energy Detector Product Configuration Guide • Excellent energy resolution in the 3 to 300 keV range • Active area from 30 to 1000 mm2 • PopTop flexibility • Unequaled timing performance • Detectors larger than 36-mm diameter available • Available with special feedback resistor for high-rate applications • POF preamplifier option for superior energy resolution and high count rate at low energies The ORTEC GLP Series Planar Low-Energy Photon Spectrometer (LEPS) is a small-area, high-purity germanium photon spectrometer for use in applications over the energy range from 3 to ~300 keV. Available in diameters from 6 to 36 mm, the LEPS offers exceptional energy resolution for low and intermediate energies. At low energies in nuclear structure physics GLP detectors are irreplaceable because of their excellent timing performance (see Table 1). A cross sectional drawing of a 16-mm LEPS is shown in Figure 1. The Following Specifications are Provided for Each Model GLP Detector • Active crystal diameter and depth. • Energy resolution at 5.9 keV photons from 55Fe at optimum shaping time unless the window material prohibits this energy. • Energy resolution at 122 keV photons from 57Co at optimum shaping time. Configuration Guidelines PopTop or Streamline (non-PopTop) Configuration The essence of a PopTop detector system is that the HPGe detector element, preamplifier, and high voltage filter are housed in a detector “capsule” which is then attached to an appropriate cryostat (Figure 2.) In so called Streamline systems, the detector capsule is NOT demountable. Detector capsule and cryostat share the same vacuum. In configuration terms, this requires a cryostat or cryostat/dewar selection with the cryostat having a matching diameter to the capsule endcap. A cryostat must always be ordered with a Streamline capsule, because they are integral. The actual PopTop capsule has its own vacuum. It can be mounted on any of the available cryostats, cryostat/dewar combinations, or the X-COOLER III mechanical cooling system.

Steps to Configure Your ORTEC HPGe Detector 1) Configure the Detector Model • Capsule type (PopTop or Streamline) • Crystal dimensions and specifications • Endcap and window • Mount • Preamplifier • Cable Package Options are available for the detector model that can change specific materials used in the construction of the detector endcap, cup, and mount. Preamplifier options are also available. 2) Configure the Cryostat/Dewar Model • Vertical Dipstick style (separate Dewar or Mobius Recycler) • Horizontal Dipstick style (separate Dewar or Mobius Recycler) • Portable with all-position or...

GLP Series Planar HPGe Low-Energy Detector Product Configuration Guide Streamline Detector Capsule Electronic Shroud Preamplifier Outside Vacuum Preamplifier default is Resistive Feedback -SMN changes to SMART-1 with HV High Voltage Filter Ge Crystal Mount default is Cu PopTop Detector Capsule Electronic Shroud Preamplifier Outside Vacuum Preamplifier default is Resistive Feedback -SMN changes to SMART-1 with HV PopTop Cold Finger Coupling High Voltage Filter Ge Crystal Mount default is Cu

GLP Series Planar HPGe Low-Energy Detector Product Configuration Guide Streamline Cryostat and Cryostat/Dewar Assemblies Streamline systems (detector capsule and cryostat) share the same vacuum, requiring a cryostat or cryostat/dewar selection with the cryostat having a matching diameter to the capsule endcap. Diameter must match Endcap Diameter -70 Diameter must match Endcap Diameter -70 Thermal Element Standard Cryostat uses Molecular Sieve Pumping Agent. Thermal Element Standard Cryostat uses Molecular Sieve Pumping Agent. Optional Dewars are DWR-30, DWR-30-OP and MOBIUS-ST Standard...

PopTop and Streamline Dimensional Data GLP Series Planar HPGe Low-Energy Detector Product Configuration Guide Streamline systems (detector capsule and cryostat) share the same vacuum, requiring a cryostat or cryostat/dewar selection with the cryostat having a matching diameter to the capsule endcap. A cryostat must be ordered with a Streamline capsule. The PopTop capsule features an internal vacuum arrangement. It can be mounted on any of the available PopTop cryostats, cryostat/dewar combinations, or the X-COOLER III mechanical cooling system. The cryostat and dewar drawings that follow...

GLP Series Planar HPGe Low-Energy Detector Product Configuration Guide Note: Cryostat/Dewar drawings are NOT to scale, see tables that follow for complete dimensions. Dimensions are for reference only and subject to change, if dimensional constraints are critical, contact the factory. CFG-LP-SJ, MOBIUS-B

GLP Series Planar HPGe Low-Energy Detector Product Configuration Guide Note: Cryostat/Dewar drawings are NOT to scale, see tables that follow for complete dimensions. Dimensions are for reference only and subject to change, if dimensional constraints are critical, contact the factory.

Note: Cryostat/Dewar drawings are NOT to scale, see tables that follow for complete dimensions. Dimensions are for reference only and subject to change, if dimensional constraints are critical, contact the factory. GLP Detector Dimensions• Dimensions are for reference only and subject to change. • If dimensional constraints are critical, contact the factory. Dim.

Ordering Information • For Streamline, remove the “P4” from the model number. • If dimensional considerations are critical, contact factory. • Cryostat and dewar or other cooling device are not included with detector. • Cryostat and dewar or other cooling device are required for operation. • A cryostat must be ordered with a Streamline detector. -SMN_SMART-1 detector option for negative bias detector, add “-SMN” to the model number. Down-looking Cryostat with 7.5-liter Dewar Down-looking Cryostat with 13-liter Dewar Down-looking Cryostat with 30-liter Dewar Gamma Gage Cryostat with...