Cavity charge

31b) Ibid, pp 376-78 (Some kinematic properties of Munroe jets) 32) J. et J. 

Basset, CR 231, 1440-42(1950) (Influence of ambient pressure on the effects of hollow charges and the combustion of propellants) 32a) H. Muraour, Chim Ind (Paris) 66, 

p 658(1951) (On the diminution of brisance of hollow charges caused by rotation) 33) E.M. Pugh et al, JApplPhys 22, 487-93(1951) (Application of Kerr-Cell to photographing of metal jets squirted from lined conical HE s charges) 34) D.C. 

292-302 303-10(1951) (Penetration into a ductile target, such as lead, mild steel, etc) 35) Z. Fonberg, JChemPhys 19, 383 (195 1) (Evidence of nuclear transmutation in the course of explosion of shaped charges with lined cavity) French transln in MAF 26, 489-91(1952) 36) P. Tauzin, 

22-3 (Munroe effect, shaped charge, or coned charge effect) 41) R.I. Eichelberger, Prediction of Shaped Charge Performance from the Release Wave Theory , 

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Shaped Charge or Hollow Charge Efficiency (Cavity Charge Performance or Munroe-Neumann Effect) Test. See Vol 1, pXXlII... 

Accdg to Cook (Ref 55, p 226) it is quite likely that the advantage of using lined cavity charges was recognized in Amer mining industry much earlier than 1936, the year in which Dr R.W. Wood is attributed by Eichelberger (Ref 4la) the discovery of the lined-cavity effect... 

Studies were made of the detonation with hemispherical, ellipsoidal, and conical liners and a theory was developed which appeared to give a plausible explanation of the optimum shapes of liners. It was discovered during these studies, that highspeed rotation decreased very markedly the cavity effect, and that consequently, spin-stabilized projectiles were ill-adapted to cavity charges. Towards the end of 1943, the spreading of the jet, due to rotation, was confirmed photographically by the Kerr-cell camera... 

Fig 3 Various Stages of Detonation Process in Lined-Cavity Charge... 

It has been claimed that with lined-cavity charge of the form shown in Fig, a succession of jets appear to strike the object to... 

Jan 1954 4la) R.I. Eichelberger, Reexamination of Theories of Jet Formation and Target Penetration by Lined Cavity Charges , Carnegie Institute of Technology, Dept of Physics, CEL Rept No 1,... 

Spencer, The Determination of Reaction Rates of Nonideal Explosives from Shaped Charge Penetration Data , Univ of Utah Inst for Study of Rate Processes, TechRept No XLVIl(1955) Contract N7-onr-45107 46) R.J. Eichelberger, JApplPhys 26, 392-402(1955) (Re-examination of the unsteady theory of jet formation by lined cavity charges) 47) Ibid, 27, 63-8 (1956) (Experimental test of the theory of penetration by metallic jets) 48) T.C. Poulter ... 

Shaped Charge (Brit Hollow Charge), also called Cavity Charge. An explosive charge with a shaped cavity to make possible the concentration of the explosive force in the desired direction. The localized explosive damage obtained by the shaped charge is known in US as Munroe Effect (Ref 23, pp 8-33 G4)... 

Cook (Ref 2) states that further commercial use of.the Jet Effect is hindered by the high cost of well-made lined-cavity charges Refs 1) Blasters Hdb (1958), pp 91-96 2)... 

Cavity Charge Efficiency. See Shaped Charge Efficiency... 

Cavity Charge Performance. See Shaped(or Hollow) Charge Efficiency in this section... 

An extensive series of measurements was also carried out on the anisotropy of the radiation-induced conductivity by carefully orientating single PDA crystals within the microwave cavity. Charge transport was found to be favored by up to two orders of magnitude along, as opposed to perpendicular to, the directors of the polymer chains. 

Shaped charge—An explosive charge of special configuration that produces very high penetrations, also called lined cavity charge. Do not write shape charge. 

The electrical potential at the surface of a charged cavity (charge q, radius r) is given by = q/4jrer. The reversible work of charging such a cavity in a medium of dielectric permittivity = eo r is... 

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