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HPULBS High Performance Ultra Low Background Lead Shields

HPULBS High Performance Ultra Low Background Lead Shield for Radiation DetectorORTEC’s high-performance, ultra-low-background Ge radiation detector shields feature the highest quality workmanship and materials available. They include features based on years of experience in lead shield design providing superior performance and ease of use.

All ORTEC high-performance, ultra-low-background lead shields feature a 1 inch thick virgin lead* inner layer to create an overall thickness of 4 or 6 inches of lead material. A graded inner liner of copper and tin layers is provided for the suppression of lead x-rays. The support stand and shield jacket are made from low-carbon steel. All external surfaces are finished in durable textured polyurethane. All shields are adjusted at the factory and movable doors and lids are positioned with packing material to prevent opening during shipment. All shields require professional installation by qualified Riggers that are competent with heavy weight installations. Once installed, the lids (and doors when applicable) should require only minimal adjustment to remove any packing material and assure proper operation. Initial adjustment instructions, warnings, and wrenches are provided with each shield. Touch-up paint can be supplied under separate order with the Material Safety Data Sheet (MSDS) and may require special shipping.

The following are supplied with each ORTEC shield:
1. Rigid support stand
2. Hinge adjustment instructions
3. Wrenches for assembly
4. Lifting eyes and lid restraint brackets
5. Two heavy-duty, wood pallet/crate sets suitable for overseas shipping

  • Literature +

  • HPULB4S1 Top Loading 4 Inch (10 cm) Ultra-Low-Background Shield +


    HPULB4S1 Top Loading 4 Inch (10 cm) Ultra-Low-Background Shield
    The HPULB4S1 ultra-low-background lead shield consists of 3 inches of reprocessed lead with a 1 inch virgin lead inner layer.

    The bottom port on the shield includes two nested inserts that allow multiple fit options. The bottom through-hole is 3.5-inches. This can be increased to a 5-inch through-hole by removing the center insert. A second insert makes up almost the entire bottom of the lead shield, providing an 8-inch through-hole when removed. The model LFT1 can be used to remove the larger bottom insert from the shield should this be required. The LFT1 is not part of the HPULB4S1 and must be ordered separately.

    The larger insert is provided for possible changes that may be required for the customer’s specifications. This 42-lb. insert can be removed and machined locally or shipped back to ORTEC for replacement and/or modification if needed without having the entire shield machined on-site or replaced.
     
    The HPULB4S1 shield is designed to accommodate ORTEC vertical dipstick cryostat models CFG-PV4, CFG-SV, CFG-LP-SV, and CFG-ICS-x or the X-COOLER-III. 

    Specifications
    Shielded Cavity Dimensions  28-cm i.d. x 40-cm high (11-in. i.d. x 16-in. high). 
    Shielding Type 3 inches of reprocessed lead with a 1 inch virgin lead inner layer, steel casing, and graded-Z liner.
    Shielding Specifications
    		 12.7 mm (0.5 in.) low-carbon steel casing
    76 mm (3 in.) reprocessed lead outer layer
    25 mm (1 in.) virgin lead inner layer
    0.5 mm (0.02 in.) tin sheet liner
    1.6 mm (0.064 in.) soft-copper sheet liner
    Support Stand Material
    		 Low-carbon steel square tubing and plate.
    Weight
    		 Total Assembled 1,134 kg (2,500 lb).
    Shipping 1,270 kg (2,800 lb).
    External Dimensions
    		 Shield 51-cm diameter x 63-cm high (20-in. diameter x 24-5/8-in. high).
    Stand 61-cm square x 77-cm high (minimum) [24-in. square x 30-1/8-in. high (minimum)].
    Assembled Height 139 cm (minimum) to 154 cm (maximum) [54-3/4 in. (minimum) to 60-3/4 in. (maximum)].

  • HPULB4S2 Top Loading 4 Inch (10 cm) Ultra-Low-Background Shield +


    HPULB4S2 Top Loading 4 Inch (10 cm) Ultra-Low-Background Shield
    The HPULB4S2 shield is a split-top shield designed for use with CFG-SJ, CFG-LP-SJ and CFG-HJ cryostats. A compact design results in the need for only 2-ft x 4-ft of floor space [61-cm x 117-cm], plus clearance for opening of the lids and front door.

    Specifications
    Shielded Cavity Dimensions  28-cm i.d. x 40-cm high (11-in. i.d. x 16-in. high). 
    Shielding Type 3 inches of reprocessed lead with a 1 inch virgin lead inner layer, steel casing, and graded-Z liner.
    Shielding Specifications
    		 12.7 mm (0.5 in.) low-carbon steel casing
    76 mm (3 in.) reprocessed lead outer layer
    25 mm (1 in.) virgin lead inner layer
    0.5 mm (0.02 in.) tin sheet liner
    1.6 mm (0.064 in.) soft-copper sheet liner
    Support Stand Material
    		 Low-carbon steel square tubing and plate.
    Detector Access Slot Width 4.5 cm (1-3/4 in.).
    Weight
    		 Total Assembled 1,134 kg (2,500 lb).
    Shipping 1,270 kg (2,800 lb).
    External Dimensions
    		 Shield 51-cm diameter x 63-cm high (20-in. diameter x 24-5/8-in. high).
    Stand 61-cm square x 77-cm high (minimum) [24-in. square x 30-1/8-in. high (minimum)].
    Assembled Height 94 cm (minimum) to 109 cm (maximum) [37 in. (minimum) to 43 in. (maximum)].

  • HPULB6S2F Top or Front Loading 6 Inch (15 cm) Ultra-Low-Background Shield +


    HPULB6S2F Top or Front Loading 6 Inch (15 cm) Ultra-Low-Background Shield
    The HPULB6S2F shield offers the lowest background performance with a combined lead thickness that is 1.5 times greater than a conventional 4 inch (10 cm) thick lead shield. The HPULB6S2F shield is designed for use with a HJ-style cryostat, features a 1 inch virgin lead inner layer (<25 Bq/kg of 210Pb guaranteed, 15–20 Bq/kg of 210Pb typical) and offers top or front loading sample capability.

    For simplicity of use, the HPULB6S2F has a patented top door design that minimizes the weight of the door and allows no background shine into the shield. The standard door opens to the right. A left opening door may be ordered as a special.

    The HPULB6S2F includes a cavity purge opening for venting LN2 or any other inert gas into the shield cavity to displace radon gas and lower the background.

    Specifications
    Shielded Cavity Dimensions  23-cm i.d. x 46-cm high (9-in. i.d. x 18-in. high).
    Shielding Type 5 inches of reprocessed lead with a 1 inch virgin lead inner layer, steel casing, and graded-Z liner.
    Shielding Specifications
    		 12.7 mm (0.5 in.) low-carbon steel casing
    127 mm (5 in.) reprocessed lead outer layer
    25 mm (1 in.) virgin lead inner layer
    0.5 mm (0.02 in.) tin sheet liner 
    1.6 mm (0.064 in.) soft-copper sheet liner
    Detector Access Slot Width 4.5 cm (1-3/4 in.).
    Weight
    		 Shield Only  ~2,000 kg (4,300 lb).
    Shipping Weight 2,100 kg (4,600 lb).
    External Dimensions (excluding hinge)
    		 Shield 59-cm diameter x 78.7-cm high (22-in. diameter x 31-in. high).

  • Options +


    Close Fitting Plugs for HPULB4S1
    Close fitting plugs for the 3.5-inch through-hole may be ordered with the HPULB4S1. Two standard models are available, PLG1 and PLG2.

    PLG1 fits inside the 3.5-inch bottom port and fits closely around the vertical dipstick cryostat.

    PLG2 is a split plug that fits inside the 3.5-inch bottom port and closely around the X-COOLER cold head. The X-COOLER systems require a split plug in order to fit between the larger diameter capsule and the cold head diameter. The two piece design allows this plug to be installed around the smaller diameter portion of the cold head.

    LSLT Table-Top Leveling Option for HPULB4S1
    LSLT allows extremely precise adjustment of the leveling of the shield. Leveling is performed at table top height using a single hex-key wrench. It can compensate for floor deviations as great as 16 mm in a 61-cm square (5/8-in. in a 24-in. square). When correctly adjusted, the Model LSLT allows the biparting lids of the shield (when unlatched) to swing slowly and gently to the fully open position, and stay there allowing full, SAFE access to the counting chamber.

    DS30 Dewar Leveling Stand
    Provides up to 15 cm (6 in.) of vertical height adjustment and features vibration isolation pads to minimize detector microphonics.

  • Ordering Information +


    Model Description
    HPULB4S1 Top Loading Lead Shield for CFG-PV4, CFG-SV, CFG-LP-SV, and CFG-ICS-x cryostats, and the X-COOLER-III.
    HPULB4S2 Front or Top Loading Lead Shield for CFG-SJ, CFG-LP-SJ and CFG-HJ cryostats.
    HPULB6S2F Front or Top Loading Lead Shield for CFG-HJ cryostats.
    LFT1 Lifting tool for removing the 9" bottom plate from the HPULB4S1 Lead Shield.
    PLG1 Single piece, close fit plug for vertical dipstick cryostat in HPLBS1 Lead Shield.
    PLG2 Two piece, close fit plug for X-COOLER cold head in HPULB4S1 Lead Shield.
    LSLT Table-Top Leveling option. HPULB4S1 only.
    DS30 Dewar Leveling Stand. HPULB4S1 or HPULB4S2 only.