Charged-Particle Detector Data Summary and Selection Chart from ORTEC

Charged-Particle Detector Data Summary and Selection Chart

* All resolution measurements are performed and warranted at 21 ±1°C.

** Measured with 5.486-MeV natural alpha particles.

† ULTRA series detectors are manufactured by ion-implantation silicon-dioxide passivated technologies. Versions bakeable at 200°C available on special order.

‡ Available with special cryogenic mount capable of cycling down to LN₂ temperature.

§ The Beta-X detector is offered in a sealed cryostat.

	ULTRA†	ULTRA AS†	ULTRA CAM†	A Series	B Series
Chief Application	High-resolution, high-efficiency alpha and beta spectroscopy	Ultra-low background high-efficiency alpha spectroscopy	Alpha and beta continuous air monitoring (counting in adverse environment)	High-Resolution charged-particle spectroscopy (Nuclear Physics and Chemistry-Space Physics)	Particle identification, telescopes of detectors (Nuclear Physics and Chemistry-Space Physics)
Starting Material	Si	Si	Si	Si	Si
Range of Active Area (mm²)	25–3000	300–1200	300–2000	25–450	50–450
Range of Active Thickness (µm)	100–500	100	100 (Deeper detector requires special order)	1000–2000	150–2000
Warranted Operating Temperature Range*	+60°C to –196°C (LN2)	+60°C to –196°C (LN2)	+60°C to –196°C	+25°C to –30°C‡	+25°C to –30°C‡
Diode Structure	Implanted Boron — N-type Si Implanted As Partial Depletion	Implanted Boron — N-type Si Implanted As Partial Depletion	Implanted Boron — N-type Si Implanted As Partial Depletion	Gold — N-type Si Aluminum Partial Depletion	Gold — N-type Si Aluminum Total Depletion
Nominal Equivalent** Stopping Power of Windows	Entrance 500 Å Si	Entrance 500 Å Si		Entrance 800 Å Si	Entrance 800 Å Si Exit 2250 Å Si

	C Series	D Series	F Series	L Series
Chief Application	Backscattering from a collimated source or beam target-angular correlation measurements (Nuclear Physics)	Time-of-flight measurements with heavy ions (Nuclear Physics)	Heavy-ion spectroscopy (Nuclear Physics)	Medium-energy proton (25 MeV) and other charged-particle energy spectroscopy
Starting Material	Si	Si	Si	Si (Lithium compensated)
Range of Active Area (mm²)	50–450	10–450	100–900	25–200
Range of Active Thickness (µm)	100–1000	15–100	³60	5000
Warranted Operating Temperature Range*	25°C to –30°C‡	10°C to 25°C	+25°C to –30°C‡	+25°C to –196°C (LN₂)
Diode Structure	Gold — N-type Si Aluminum Partial Depletion	Gold — N-type Si Aluminum Total Depletion Planar	Gold — N-type Si Aluminum Partial Depletion High Field Strength	Gold — Lithium Compensated P-type Si Lithium (diffused)
Nominal Equivalent** Stopping Power of Windows	Entrance 800 Å Si Exit 2250 Å Si	Entrance 800 Å Si Exit 2250 Å Si	Entrance 800 Å Si	Entrance 800 Å Si

	P Series	R Series	Beta-X§
Chief Application	Simultaneous measurement of charged-particle energy and position (Nuclear Physics)	Charged-particle spectroscopy operable in air and ambient light	High-resolution beta spectroscopy
Starting Material	Si	Si	Si (Lithium compensated)
Range of Active Area (mm²)	8 x 47	50–2000	80
Range of Active Thickness (µm)	100–1000	100–500	5000
Warranted Operating Temperature Range*	+25°C to –30°C‡	+25°C to –30°C‡	–196°C (LN₂)
Diode Structure	Implanted Boron — N-type Si Aluminum Partial Depletion	Aluminum — P-type Si Gold Partial Depletion	Gold — Lithium Compensated P-type Si Lithium (diffused)
Nominal Equivalent Stopping Power of Windows**	Entrance 3200 Å Si	Entrance 2300 Å Si	Entrance 800 Å Si (after removal of Be Window)