MDDC - 860 
 
 UNITED STATES ATOMIC ENERGY COMMISSION 
 
 CLOUD CHAMBER AND MAGNET ASSEMBLY WITH STRUCTURAL 
 FRAME AND HEAT EXCHANGE 
 
 Radiation Laboratory, 
 University of California 
 
 Date of Manuscript: 
 Date Declassified: 
 
 September 24, 1946 
 AprU 21, 1947 
 
 Issuance of this document does not constitute 
 
 authority for declassification of classified 
 
 copies of the same or similar content and title 
 
 and by the same author. 
 
 Technical Information Branch, Oak Ridge, Tennessee 
 AEC, Oak Ridge, Tenn., 2-9-49--850-A2174 
 
 Printed in U.S~A. 
 PRICE 5 CENTS 
 
MDDC - 860 
 
 
 i-h; 
 
 -48- 
 
 PIPE WITH CAST BRONZE SOLDER 
 FITTINGS AND HARD COPPER TUBING 
 
 AFTER WELDING ON 24 ST AND 61 ST 
 AL ALLOY RE-HEATREAT TO "T" CONDITION 
 BY RAISING TO 970° F AND QUENCHING 
 IN COLD WATER 
 
 MATERIAL BRINELL HARD (500 KG,10MMBALL) 
 
 24 ST 120 
 
 61 ST 90 
 
 Figure 1. Cloud chamber and magnet asse 
 
' with structural frame and heat exchange.