Horizontal cryostat for polarized proton targets

✍ Scribed by P. Roubeau

• Publisher: Elsevier Science
• Year: 1966
• Tongue: English
• Weight: 686 KB
• Volume: 6
• Category: Article
• ISSN: 0011-2275
• DOI: 10.1016/0011-2275(66)90069-5

✦ Synopsis

B E F OR E describing the cryostat we give the general characteristics of the target likely to be of particular interest to the nuclear physicist who is using it. They are summed up here as follows: Method: Solid effect Substance used: La2 (0.01Nd) Mg3 (NOa)lE.24H20 crystal Polarization of H protons: 70-85 per cent Polarized volume: 1-10 cm 3 Free protons in crystal: 400 x 1020 cm -3 Bound protons in crystal: 5 900 x 1020 cm -3 Neutrons in crystal: 6 300 × 1020 cm -3 Matter (excluding crystal) on beam path: 1.2 g/cm 2 Matter (excluding crystal) on path of diffused particles: 0.5 g/cm 2 H.F. power in cavity: 0.5-2 W Working temperature: 1.05-1.15 ° K Helium consumption: 50 l./day (for W = 1 W) Operation: continuous