Data taking above nucleon production threshold

Submitted by dshwartz on Mon, 03/30/2020 - 21:59

VEPP-2000 was taking data at the high energy range above nucleon-antinucleon pairs production (940 MeV/beam) after the NY shutdown. The work was very successful, several records were established, routine luminosity had reached 4×1031cm-2s-1. Daily luminosity integral few times has exceeded 2pb-1, while weekly integral record reached 10pb-1.

Lowest energy, highest luminosity

Submitted by dshwartz on Mon, 12/16/2019 - 20:24

We stop today for a (short) winter shutdown. The low energy run Oct-Dec'2019 was dedicated to our lowest energy range (180-300 MeV/beam). It turned out to be extremely successfull: the luminosity at E=180 MeV achieved L=0.6*10^30cm-2s-1 (see routine screenshot), that is a factor of 5(!) higher than our previous record obtained during low-energy run in 2013. Needless to say that it is the highest luminosity value ever observed in the world at these energies.

Decelerating beams: first ever at the complex

Submitted by dshwartz on Thu, 12/21/2017 - 01:23

The new experimental run of VEPP-2000 complex started in November. In contrast to previous high energy scan, current data taking (experiment RHO2017) is dedicated to energy region below 500 MeV per beam. Started at Phi-meson the scan is currently moved below 390 MeV. It is the energy level of the beams provided by new BINP Injection Comlex. It means that for top-up injection to VEPP-2000 collider the beams now are decelerating at our booster synchrotron BEP, for the first time at the VEPP-2/2M/2000 complex!

Run 2016/2017 is over

Submitted by dshwartz on Wed, 07/12/2017 - 01:45

The fruitful run 2016/2017 is finished. The data was collected in the energy range of 640-1003.5 MeV per beam (experiment 'HIGH2017'). The total integrated luminosity amounts to 53 pbn-1 per each detector, that is comparable to the data collected during three runs 2010-2013, and exceeds the total data collected by several generations of detectors at VEPP-2M (predessor of VEPP-2000). These excellent results were achieved due to usage of new powerful BINP Injection Complex and of course due to hard work of skilled VEPP-2000 team.

Above the design top energy!

Submitted by dshwartz on Fri, 04/21/2017 - 22:23

The run 2016/2017 is going on. Both detectors are taking data while VEPP-2000 is moving step by step from the 850 MeV/beam energy level to it's top limit. The experimental program was suddenly expanded with request to collect some data @ 2007MeV at c.m., that corresponds to D0*-meson mass. Today this energy was surprisingly achieved and even surpassed. The Compton Back Scattering beam energy measurement system fixed the moment of energy tuning with 1005 MeV per beam value.

VEPP-2000 running in Round Beam mode

Submitted by dshwartz on Sat, 12/17/2016 - 19:17

During summer shutdown further modifications of BEP were done. Two modern pickups were installed. Two copper mirrors for synchrotron radiation based beam diagnostics were changed due to insufficient quality. The new SR outlet for future material science experiments was equiped with movable water cooled absorber. At the end of the K-500 tunnel the Faraday cup was installed for absolute beam charge measurements.

The 2015/2016 season short chrono

Submitted by dshwartz on Sat, 12/17/2016 - 18:23

20.07.2015 – The magnetic measurements of BEP magnets are finished.
08.10.2015 – BEP magnets are assembled at site.
23.12.2015 – Vacuum of 10-6 Pa is pumped at BEP.
16.01.2016 – BEP is fully assembled, powered and ready for beam
27.01.2016 – First е- captured to BEP (at 390 MeV)!
16.02.2016 – Beam current achieved 500 mA at BEP during beam scrubbing.
21.03.2016 – The BEP-VEPP transfer channel assembly is finished.
22.03.2016 – Beam extracted from BEP.

Electron beam back @ VEPP-2000.

Submitted by dshwartz on Wed, 05/04/2016 - 01:46

Since the beginning of the year we were working hardly to bring the beam from booster synchrotron BEP to VEPP-2000 storage ring. Transportation channels with new dipoles capable to work @ 1 GeV were assembled and aligned precisely. The beam step-by-step moved through the beamline controled @ two types of BPMs.

First beam @ BEP!

Submitted by dshwartz on Thu, 01/28/2016 - 00:46

Great news! First electron beam captured into upgraded booster BEP. Synchrotron light of tiny beam is visible by CCD or naked eye.

Towards beam arrival

Submitted by dshwartz on Mon, 12/21/2015 - 00:37

In September all the BEP quads were coupled into doublets, precisely aligned and doweled. In October the magnetic system was assembled at the booster hall and geodesicaly aligned. The vasuum system assembly started. In parallel the K-500 transfer channel was finished. The vacuum was obtained in the middle of December.