Effects of core-level excitation on theF-center formation in KCl and KBr at liquid-helium temperature

1993 ◽  
Vol 70 (6) ◽  
pp. 810-813 ◽  
Author(s):  
Yasuhiro Kondo ◽  
Shuuji Hoshina ◽  
Shouichi Hiroto ◽  
Ikuma Goto ◽  
Yoshiaki Kon’no ◽  
...  
Keyword(s):  
Liquid Helium ◽  
Liquid Helium Temperature ◽  
Core Level ◽  
Helium Temperature

Water accumulation as a function of temperature on specimens in an electron microscope cold stage

1986 ◽  
Vol 44 ◽  
pp. 114-115 ◽  
Author(s):  
M.K. Lamvik ◽  
D.A. Kopf ◽  
S.D. Davilla ◽  
J.D. Robertson
Keyword(s):  
Electron Microscope ◽  
Mass Loss ◽  
Liquid Helium ◽  
Liquid Nitrogen ◽  
Liquid Nitrogen Temperature ◽  
Liquid Helium Temperature ◽  
Helium Temperature ◽  
Cold Stage ◽  
Water Accumulation ◽  
Better Than

Last year we reported1 that there is a striking reduction in the rate of mass loss when a specimen is observed at liquid helium temperature. It is important to determine whether liquid helium temperature is significantly better than liquid nitrogen temperature. This requires a good understanding of mass loss effects in cold stages around 100K.

Photic reactions of chicken iodopsin and rhodopsin at liquid helium temperature

1975 ◽  
Vol 15 (7) ◽  
pp. 819-823 ◽  
Author(s):  
Yoshihiko Tsukamoto ◽  
Shinri Horiuchi ◽  
Toˆru Yoshizawa
Keyword(s):  
Liquid Helium ◽  
Liquid Helium Temperature ◽  
Helium Temperature

Study on cooling capacity characteristics of an open-cycle Joule-Thomson cryocooler working at liquid helium temperature

2020 ◽  
Vol 166 ◽  
pp. 114667 ◽  
Author(s):  
Yunwei Shen ◽  
Dongli Liu ◽  
Sifan Chen ◽  
Qinyu Zhao ◽  
Lei Liu ◽  
...  
Keyword(s):  
Liquid Helium ◽  
Cooling Capacity ◽  
Liquid Helium Temperature ◽  
Helium Temperature ◽  
Open Cycle

Investigation of AlGaN∕AlN∕GaN heterostructures for magnetic sensor application from liquid helium temperature to 300°C

2008 ◽  
Vol 92 (4) ◽  
pp. 043504 ◽  
Author(s):  
L. Bouguen ◽  
S. Contreras ◽  
B. Jouault ◽  
L. Konczewicz ◽  
J. Camassel ◽  
...  
Keyword(s):  
Liquid Helium ◽  
Magnetic Sensor ◽  
Liquid Helium Temperature ◽  
Helium Temperature ◽  
Sensor Application

Fatigue Crack Growth Properties of a Cryogenic Structural Steel at Liquid Helium Temperature

1996 ◽  
Vol 118 (1) ◽  
pp. 109-113 ◽  
Author(s):  
Shinji Konosu ◽  
Tomohiro Kishiro ◽  
Ogi Ivano ◽  
Yoshihiko Nunoya ◽  
Hideo Nakajima ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Fatigue Crack ◽  
Austenitic Stainless Steel ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Liquid Helium ◽  
Liquid Helium Temperature ◽  
Small Scale ◽  
Helium Temperature ◽  
Growth Properties

The structural materials of the coils of superconducting magnets utilized in thermonuclear fusion reactors are used at liquid helium (4.2 K) temperatures and are subjected to repeated thermal stresses and electromagnetic forces. A high strength, high toughness austenitic stainless steel (12Cr-12Ni-10Mn-5Mo-0.2N) has recently been developed for large, thick-walled components used in such environments. This material is non-magnetic even when subjected to processing and, because it is a forging material, it is advantageous as a structural material for large components. In the current research, a large forging of 12Cr-12Ni-10Mn-5Mo-0.2N austenitic stainless steel, was fabricated to a thickness of 250 mm, which is typical of section thicknesses encountered in actual equipment. The tensile fatigue crack growth properties of the forging were examined at liquid helium temperature as function of specimen location across the thickness of the forging. There was virtually no evidence of variation in tensile strength or fatigue crack growth properties attributable to different sampling locations in the thickness direction and no effect of thickness due to the forging or solution treatment associated with large forgings was observed. It has been clarified that there are cases in which small scale yielding (SSY) conditions are not fulfilled when stress ratios are large. ΔJ was introduced in order to achieve unified expression inclusive of these regions and, by expressing crack growth rate accordingly, the following formula was obtained at the second stage (middle range). da/dN = CJ ΔJmJ, CJ = AJ/(ΔJ0)mJ, where, AJ = 1.47 × 10−5 mm/cycle, ΔJ0 = 2.42 × 103N/m.

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