The 7700A Series HMS is discontinued. No new orders are being accepted. We encourage you to consider the 8400 Series HMS instead. Please feel free to call us to discuss.

Specifications

 7704A7707A7710A9709A
Magnetic field

 

Please consult
Lake Shore for
10 in magnet option information

 
Room temp
±1.3 T±2 T±9 T
Variable temp
±0.87 T±1.2 T±9 T
Temperature 
Standard
77 K or room temperature2 K to 400 K
CCR
15 K to 350 KNA
Oven
350 K to 800 KNA
Carrier concentration density8 × 102 to 8 × 1023 cm-38 × 102 to 8 × 1023 cm-3
Mobility1 to 1 × 106 cm2/V s1 to 1 × 106 cm2/V s
Current (A)±1 pA to ±100 mA±1 pA to ±100 mA
Voltage (V)0 V to 100 V0 V to 100 V
Resistance range (standard)
2% accuracy—VdP minimum: 0.5 mΩ,
HB minimum: 0.8 mΩ, maximum: 100 GΩ
5% accuracy—VdP minimum: 0.1 mΩ,
HB minimum: 0.04 mΩ, maximum: 200 GΩ
2% accuracy—VdP minimum: 0.5 mΩ, HB minimum: 0.8 mΩ, maximum: 100 GΩ
5% accuracy—VdP minimum: 0.1 mΩ, HB minimum: 0.04 mΩ, maximum: 200 GΩ
System equipment 
Sample holder module
75013 room temperature/77 K; 1-sided sample cards
 
9500-SI;
1-sided sample cards
Sample holder kit
(included with sample
holder module)
(1) 750SC10-50, (1) 750SC50-10, (1) 671-205, (1) 671-260, (1) 671-250, and (10) 1-inch sheets of indium foilIntegrated into 9500-SI
Sample size
Up to 10 × 14 mm (0.4 × 0.6 in)
on a 25 × 75 mm (1 × 3 in) card;
up to 60 mm (2.4 in) square
on an 82 × 93 mm (3.2 × 3.7 in) card
Up to 76 mm (3 in) in diameter12 × 14 mm (0.5 × 0.6 in) in a 25.4 mm (1 in) bore
Number of samples11
Model 475 gaussmeter1NA
Model 776 matrix11
Keithley equipment 
6220 Current Source11
6485 Autoranging
Digital Picoammeter
11
2182A Digital Voltmeter11
MagnetEM4-HVAEM7-HVSuperconducting
Pole diameter102 mm (4 in)178 mm (7 in)NA
Pole face diameter102 mm (4 in)152 mm (6 in)76.2 mm (3 in)NA
Max magnetic field at
room temperature
1.3 T (13 kG)
at 25 mm (1 in)
air gap
1.6 T (16 kG)
at 25 mm (1 in)
air gap
2.17 T (21.7 kG)
at 25 mm (1 in)
air gap
9 T
Max magnetic field at
variable temperature
0.87 T (8.7 kG)
at 51 mm (2 in)
air gap
1.18 T (11.8 kG)
at 51 mm (2 in)
air gap
1.47 T (14.7 kG)
at 51 mm (2 in)
air gap
9 T
Field homogeneity±0.1% over 10 mm3 (0.4 in3)±0.1% over centered 51 mm (2 in) diameter circle±0.1% over 60 mm (2.3 in) on axis
Cooling water
requirements
Tap water or closed cycle cooling system (optional chiller available)Liquid helium
Inlet temperature25 °C (77 °F) maximum32 °C (90 °F) maximumNA
Pressure drop200 kPa (30 psi)220 kPa (32 psi)NA
Flow rate7.6 L (2 gal)/min11.4 L (3 gal)/minNA
Water chiller
cooling capacity
2.5 kW (8,530 BTU)/h5 kW (17,060 BTU)/hNA
Bipolar magnet power supply643648625
ModeDCDC
Maximum output±35 V ±70 A (2450 W)±75 V ±135 A (9.1 kW nominal)±5 V/±60 A (300 W)
AC line input
204/208 VAC ±10%, 13 A/phase;
220/230 VAC ±10%, 12 A/phase;
380 VAC ±10%, 7 A/phase;
400/415 VAC ±10%, 6.5 A/phase at 50/60 Hz
200 VAC ±10%, 41 A/phase;
208 VAC ±10%, 40 A/phase;
220 VAC ±10%, 38 A/phase;
230 VAC ±10%, 37 A/phase;
380 VAC ±10%, 23 A/phase;
400 VAC ±10%, 21 A/phase;
415 VAC ±10%, 21 A/phase
Single phase 100, 120, 220, 240 VAC +6% -10%, 50 or 60 Hz, 850 VA
Flow rate5.7 L (1.5 gal)/min minimum7.6 L (2 gal)/minNA
Cooling water
requirements
Tap water or closed cycle cooling system (optional chiller available)
+15 °C to +30 °C
Tap water or closed cooling system
(optional chiller available)
+15 °C to +30 °C
Air cooled
Computer
Dell® computer with HDD, CD-ROM, 19-inch SVGA flat screen monitor, Windows® OS,
Hall software, and National Instruments IEEE-488 USB adaptor