Specifications - Cryostat

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	CB-1	CB-2	CB-3	CB-4
outer diameter (lower part)	48 cm	48 cm	48 cm	48 cm
inner diameter (lower part)	40 cm	40 cm	40 cm	40 cm
length (lower part)	96	96	96	96
liquid helium level indicator	Ο	Ο	—	—
N2 jacket dewar	Ο	Ο	—	Ο
N2 check valve	Ο	Ο	—	—
year purchased	1998	—	2002	1995
outer diameter (middle part)	20	20	20	20
length (middle part)	41	41	41	41
outer diameter (upper part)	25	25	25	25
length (upper part)	38	38	38	38
vacuum degree and the measured date	1.7E-06 2009 Oct 6	2.9E-05 2009 Oct 2		6.5E-04 2009 Oct 2
			JECC Torisha Co. Ltd. type 36117