Transcript Status of the RF systems development 10

Status of RF stations for NICA project
MAC meeting 19-20 october 2015
 Booster RF stations
 Modernization of Nuclotron RF stations
 Barrier RF stations for Collider
 2-nd (harmonic) RF stations for Collider (RF2)
 3-ed (harmonic) RF stations for Collider (RF3)
MAC meeting 19-20 october 2015
Booster RF system
In april 2015 RF stations were delivered, assembled and mounted on a test bench in JINR.
Testings were made as well by BINP team. Stations were officially handed over to the JINR and
are ready for installation at the booster's ring.
An agreement was signed for the second set of control electronics. An agreement for the
development and production of magnetic field sensor is preparing for signing also.
BINP team in test bench’s pavillion in JINR
MAC meeting 19-20 october 2015
Booster RF stations
Power part
MAC meeting 19-20 october 2015
Low level part
Nuclotron RF system
It is currently being modernized the individual components of the system such as:
 The contract between JINR and BINP for developing and production of
preamplifier is under preparation now.
 Intermediate amplifier have already been developed, produced and delivered
to JINR by BINP.
Intermediate amplifier
MAC meeting 19-20 october 2015
BB RF system for Collider
The agreement was signed on the implementation of research and development work:
Development and production of prototype of the section of the barrier acceleration station». It
includes:

Development of the construction of the barrier section of the station (investigation of
parameters of rings, development and production of a prototype of section (including ring,
elements of cooling, elements of electronics), test bench)

Development of the contactor’s construction of accelerating gap and preparation of design
documentation . The development of test procedures of spring contacts of contactor on
longevity, preparation of design documentation for the test bench.
 The theoretical (numerical) study of the effect of noise of the barrier system on the
longitudinal beam emittance with electron and stochastic cooling during accumulation and
acceleration
MAC meeting 19-20 october 2015
BB RF system for Collider
Intermediate results:
1. Development of the construction of the barrier section of the station: Each section
of the barrier station includes a ring of amorphous iron with loops for connection
transistor pulse shaping.
Two brands of amorphous material- 5B-M (iron-based), and M-84HV (based on cobalt)
are considered for rings. 5B-M Material was used for RF booster stations. Parameters
of rings were investigated. The rings based on cobalt are considered to be more
preferable by now.
Prototypes of rings of amorphous materials
(dimensions: 260x200x15 mm)
MAC meeting 19-20 october 2015
BB RF system for Collider
2. Electronics for the BB RF section includes quick keys to obtain the
necessary pulse voltage:
Two types of core transistors company Microsemi - DRF1200 and DRF1400
are investigating now. Acquired keys DRF1200 (20 pcs.) And DRF1400 (10
pcs.). Section is preparing for test bench investigations in working regime
MAC meeting 19-20 october 2015
BB RF system for Collider
3. Preparation of the stand. Testing the section in operation for:
•
Study of the thermal regime of the section
•
Study of parameters (amplitude, shape) of pulses
•
Study of the density spectrum of parasitic amplitude and phase modulation of the
voltage on the ring
MAC meeting 19-20 october 2015
BB RF system for Collider
Contactor for accelerating gap
When station is idle its gap is shorten by mechanical contactor.
Contactor is a tube with a diameter close to the diameter of a vacuum chamber with spring contacts (beryllyum
bronze). Contactor moves in vacuum. The motion is transferred via sylphons.
Test bench is needed for:
- Defining of the actual resource of spring contacts, and sylphons (should be not less
then 100000)
- Defining of the necessary precision of positioning of contactor
MAC meeting 19-20 october 2015
BB RF system for Collider
Contactor design of
accelerating gap
(preliminary data).
Sketch of stand for
testing elements of
contactor
MAC meeting 19-20 october 2015
BB RF system for Collider
The theoretical (numerical) study of the effect of noise of barrier
system on the longitudinal beam emittance with electron and
stochastic cooling is started on as well as analysis of methods of
measuring parasitic modulation of the accelerating voltage and the
barrier voltage
MAC meeting 19-20 october 2015
Thank you for your attention
MAC meeting 19-20 october 2015