Inserting stainless steel mesh to prevent stray ions rising from the depths …. cryostat back to VG |
few hundred volts might get to the tip |
step change in current |
phoned VG re cryostat !*!!!? |
On monday field emission meeting at Imperial College |
studying literature …. effect of He … small field range |
Above film was v. out of focus & was useless …. |
(schematic !) |
Tuesdays expt was not completely successful …… |
at this point, the bloody camera was discovered not to be winding on. Oh happy day. |