Project leaders: A. Sissakian, A. Sorin

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Project leaders A. Sissakian, A.
Sorin Accelerator group leaders I. Meshkov, A.
Kovalenko JINR N.Agapov, V.Alexandrov, A.Alfeev,
O.Brovko, A.Butenko, B.Vasilishin, V.Volkov,
E.D.Donets, E.E.Donets, A.Eliseev, I.Issinsky,
G.Khodzhibagiyan, V.Karpinsky, V.Kobets,
O.Kozlov, A.Kuznetsov, V.Mikhaylov, V.Monchinsky,
A.Sidorin, G.Sidorov, V.Shevtsov, A.A.Smirnov,
A.V.Smirnov, V.Toneev, G.Trubnikov,
V.Zhabitsky. IHEP O. Belyaev, Yu. Budanov,
I. Zvonarev, A. Maltsev INR V. Matveev,
L. Kravchuck Editors I. Meshkov A. Sidorin
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?????????? ??????? 1. ????????? ??????? ?????
???????? ????????? 2. ????? ? ????? ??????
????????? 3. ?????????? 4. ???????? 5.
??????-?????????? 6. ????????? 7. ????????? 8.
?????? ????????? 9. ???????????? NICA ??????????
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1.????????? ??????? ????? ???????? ?????????
???-?????? ????????? ????? ??? ?????
??????? ??????? ? 238U92, p?,
d? ????. ????. ?????????, ??? 45 ????. ???????,
???/? ? 12.6 238U92 4.36
????????? "???????????" ?????????
??????? 238U92
???????, ???/? 1.0 3.5 ??????????,
??-2??-1 6.6?1025 1.1?1027
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Existing beam lines (solid target exp-s)
?????? 205
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2. ????? ? ????? ?????? ????????? (???????????)
Injector 2109 ions/pulse of 238U32 at energy
6 MeV/u
Booster (30 Tm) 2(3?) single-turn injections,
storage of 3.2109, acceleration up to 50
MeV/u, electron cooling, acceleration up to 400
MeV/u
Collider (45 Tm) Storage of 15 bunches ? 1?109
ions per ring at 3.5 GeV/u, electron and/or
stochastic cooling
Stripping (40) 238U32 ? 238U92
Nuclotron (45 Tm) injection of one bunch of
1.1109 ions, acceleration up to 3.5 GeV/u max.
Two superconducting collider rings
IP-2
IP-1
2?15 injection cycles
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2 x 1.5?1010 ions of 238U92
2 cycles of injection, electron cooling (?)
electron cooling
30 injection cycles of 1?109 ions 238U92 per
cycle
stripping to 238U92
238U32
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1) ????????????? ?????? nbunch Nbuch
2) ? ? "hour-glass effect" ? minimum lbunch ?
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3. ?????????? ? ??? ?? ??? ???????? (???????????)
1) ????????????? ?????? nbunch Nbuch

• nbunch limitation
• "electron cloud" effect,
• multibunch beam instability,
• technical parameters of the injection system.

• Nbunch limitation
• Laslett tune shift,
• Beam-beam effect,
• Coherent instabilities

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3. ?????????? ? ??? ?? ??? ???????? (???????????)

3) ? ?min
3.1. ? ?min ? Nbunch? lbunch? nbunch?


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3. ?????????? ? ??? ?? ??? ???????? (???????????)

3) ? ?min
3.2. ? ?(t)

Intrabeam scattering (IBS)
Emittances ?x,y(t) dp(t)/p
L(t)
?IBS 50 s ? ?storage ? a cooling is required!
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3. ?????????? ? ??? ?? ??? ???????? (???????????)

Colliding beams parameters

????? ?????????? "???????????" ?????????, ?????
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???????? B T Ions Nion/pulse ?????-2
3.0 Au30 5?108 exp ?????-6? 6.0
Au32 2?109 scaled B2
Normalized emittance ? 0.2 ??mm?mrad (BNL)
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5. ??????-??????????
Booster layout
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5. ??????-?????????? (???????????)
????? ???? ????????? ???????
"??????" ??? ?????????????????????????
?????????? (V.Mikhailov)
Electric parameters
Red hard for realization, green easily to
realise, blue - conventional
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5. ??????-?????????? (???????????)
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6. ?????????
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6. ????????? (???????????)
???????? ?????????? (?????????-?)

• ???? ??????? ? 2010 ?. ??????????, ???????????
• ??? ?????????? ??????? NICA ????????? ???????
  ?????
• A200, ? ?????????????? ?????? 109 A/????,
  ????????
• ?????????? 0.2-0.4 ?? ??? ??????? 3.5 ???/? ???
  U92
• ?????????? ????? ???????????? ???????
• ???????????? RF ???????, ?????? ???????????
• ? ?????????? ???????
• ?????????????????? ????????? ???????
• ?????????????????? ?????? ???????- ? ????-???????
• ???????? ?????????? ??????????? ??????????????

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6. ????????? (???????????)
???????? ?????????? (?????????-?)
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6. ????????? (???????????)
??????? - ???? ?? ???????? ?????!
RF phase and (later) amplitude jumps bunch
overturn in phase space
(A.Eliseev)
?E
Bunch length (phase length)
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6. ????????? (???????????)
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????? ???????? ?????-6?
???????????? ??????? ???????
???????????? ??????????
???????????? ?? ???????
???????????? ????????? ???????
6. ????????? (???????????)
?????????? ? ???????? ??????. ?????????? ??????.
?????? ????? ????????? ????
?????? ??????
???????????? ??????
??????? ?????????? ? ???????????
?????????????? ? ?????? ?? ????? ??????,
???????, ??-????????, ??????????????? ?????????.
????? (2007-2010) ????????? ? ???????????? 2387
k ?????? ????? ???????? 3165 k
????????-???????????? ??????
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7. ?????????
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7. ????????? (???????????)
?????? ??????????
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7. ????????? (???????????)
Bunch number limitation by technical
parameters of the injection system (A.B.Kuznetsov)
?lbunch ? 0.5?(?kicker ?jitter)??c
?kicker ? 300 ns ? nbunch ? 15
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7. ????????? (???????????)
Single bunch parameters limitation
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Three prototypes
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W band width of the feed back M the mixing
factor
7. ????????? (???????????)
Stochastic cooling
? Hopeless!
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S-cooling with shifted PU electrodes
T.Katayama, I.Meshkov, D.Moehl
7. ????????? (???????????)
Stochastic cooling (contnd)
It makes sufficient a conventional
S-cooling system of 5 GHz band width
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8. ?????? ????????? ???????
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8. ?????? ????????? ??????? (???????????)

• 8.1. ????????? ??????
• 3 ??????????? ??????, ??????????????
• 1) ?.?.?????????,
• 2) ?????????????? ??????????? NICA
• ? ???????,?.??????, ?.?????, ?.????????,
  ?.??????????, ?.???????, ?.?????????,
  ?.???????????,
• 3) ?.??????.
• ?????????? ? ?????????????? ??????? ???????

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8. ?????? ????????? ??????? (???????????)
8.1. ????????? ?????? (???????????)

• ??????????? ???????????? ?????????
• ???????????? (1 ???.-????? 1 k),
• ????????? ?????????? ? ????????????,
• ????????? ?????????.

8.2. ??????????? ????????? ??????

• ?????????? ??????? (paper work),
• ??????????????? (?? ??????? ?? ??????? ???????
  ????????),
• ????????????,
• ?????? - ??????,
• ?????-?????????? ??????.

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8. ?????? ????????? ??????? (???????????)
8.1. ????????? ?????? (???????????)

• ??????????? ???????????? ?????????
• ???????????? (1 ???.-????? 1 k),
• ????????? ?????????? ? ????????????,
• ????????? ?????????.

8.2. ??????????? ????????? ??????

• ?????????? ??????? (paper work),
• ??????????????? (?? ??????? ?? ??????? ???????
  ????????),
• ????????????,
• ?????? - ??????,
• ?????-?????????? ??????.

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8. ?????? ????????? ??????? (???????????)
8.3. ??????????? ????????? ???????????, ??????
??
???????? ??????? ??????? ???????
????? 1. ?? ????????? ??????? 1.
?????????? ?????? 2. ????????? ???????
2. ???????????? ?????? 3. ???????
??????-??????? 4. ?? ???????
????????? 5. ??????? ??-?? ???-??
1. ?? ????????? ??????? 6. ???????? ??????
2. ????????? ??????? 7. ??????????
???????????
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8. ?????? ????????? ??????? (???????????)
8.4. ?????????? ?????? (US k)
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9. ???????? ????? ??????? NICA /MPD

• I ???? ????????????? ???????? ?????????-?
• (2008-2010) ? ???????????
  ??????????????,
• ????????? RD
• ?????????? ???????? ???????
• II ???? ?????????? ? ????????????
  ?????????
• (2008-2012) ????????? ??????????
• ???????? ??????????????
• III ???? ????????? ????????????, ??????
• (2010-2012)
• IV ???? ???????, ??????? ? ?????? ?
  ????????????
• (2013-2014)

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10. ???????????? NICA
????
NICA
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