LEPTA news

Lepta ring status

After all the improvements and modifications the ring has been reassembled, the electron beam circulation has been obtained again and its life time has been remeasured. Typical life time dependence on electron energy, t(E), has two slopes . The left one, where t increases with energy, is defined by electron scattering on residual gas. The right slope, descending with energy, relates to violation of electron motion adiabaticity on inhomogeneities of solenoid magnetic field. The curves 1 and 2 was obtained in 2005, whereas the curves 3, 4 and the point 5 has been measured in June 2008. The curve 6 was measured in August 2009, after all the ring modifications described above.

Positron injector status

July, 2009

22Na positron source of activity of 25mCi from iThemba LABS (RSA) was mounted in the LEPTA injector and first test of cryogenic source of slow monochromatic positron was done. During experiments with isotope the slow positron beam with an intensity of 1.5*105 positrons/ s and a spectrum width of 2.3 eV has been obtained (fig.1). The next experiments will be start in the middle of October, 2009.

NICA news

Status of the NICA TDR

September 9-12, Dubna, NICA roundtele workshop IV

In JINR was held The round table dedicated to phisics at NICA (see here). Report related to the development of NICA accelerators was presented by Dr.I.Meshkov "Status of the NICA TDR"

The workshop MAMI&Beyond

March 30 - April 3

Igor Meshkov has presented an invited review talk "Electron cooling for high energy ion beams"

Cooler

March 30 - April 4, FZ Juelich

Andrey Kobets and Igor Meshkov visited FZ Juelich for discussion of common work plans and, particularly, feasibility of stochastic cooling system development for NICA collider (see report)