Steps to Configure Your ORTEC HPGe Detector
1) Configure the Detector Model
• Capsule type (PopTop or Streamline)
• Ge Crystal efficiency and specifications
• Endcap and window
• Mount
• Preamplifier
• High Voltage Filter
• Cable Package
• Integrated Cryocooling System (ICS)
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 or ICS Model
• Vertical Dipstick style (separate Dewar or Mobius Recycler)
• Horizontal Dipstick style (separate Dewar or Mobius Recycler)
• Portable with all-position or multi-position cryostat/dewar models
• Downlooking designed to be oriented with the detector pointing down
• Sidelooking designed to be oriented with the detector horizontal at the bottom of the dewar
• “J” configurations designed with the detector attached near the bottom of the dewar and a right angle bend in the cryostat orienting the detector to look up.
A cryostat and dewar or other cooling device are required for operation.
If a PopTop detector has been selected, you can choose a PopTop style cryostat, cryostat/dewar combination or the X-COOLER III or ICS-P4 mechanical
cooling systems.
If a Streamline detector has been selected, you must choose a cryostat or cryostat/dewar model for the detector to be mounted on and vacuum sealed or an
ICS. The cryostat, cryostat/dewar combination or ICS diameter must match the endcap diameter of the selected detector.
Detector Options
Integrated Cryocooling System Option
(-ICS, -ICS-E)
The Integrated Cryocooling System (ICS) cryostat is sealed with a cryocooler and is immune to thermal short cycling. Unlike
the typical three day loss of use of the detector with a standard type cryostat, the ICS can be re-cooled immediately,
minimizing any time lost for temporary warm up. The ICS is available with an internal preamplifier (-ICS) or an external
preamplifier (-ICS-E).
Integrated Cryocooling Low-Background System
(-ICS-LB)
Low-background detector with internal preamplifier, high purity aluminum endcap, high purity aluminum window, high purity
aluminum internal cup, and low-background Cu mount for the ICS Integrated Cryocooling System. The lower background
material allows for lower Minimum Detectable Activity (MDA) for a specific counting time, which provides another step in
increasing sample throughput in low-background applications.
SMART-1 Option
(-SMP)
The SMART-1 option monitors and reports on vital system functions, and can save authentication codes
and report the code at a later time. It has the high voltage included, so none of the instruments require an
external high-voltage power supply.
The SMART-1 is housed in a rugged ABS molded plastic enclosure and is permanently attached to the
detector endcap via a molded-strain-relieved sealed cable. This eliminates the possibility that the detector
will suffer severe damage from moisture leaking into high-voltage connectors. The SMART-1 can be
positioned in any convenient place and does not interfere with shielding or other mounting hardware.
GEM Series Coaxial HPGe Detector
Product Configuration Guide
2
Fig. 2. Diagram of PopTop Detector.
Fig. 3. ICS Integrated
Cryocooling System.
Fig. 4. SMART-1 Detector Interface Module.
