THEME03-1-0983-92/2004

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03-1-0983-92/2004

Priority:

Status:

Extended

Study of Multiple Production in 4-geometry and Construction of the SPHERE Spectrometer. First-Line Experiments at the Nuclotron

Leader:

A. Malakhov

Scientific Programme:

Dveloment of the SPHERE spectrometer and experiments on cumulative particle production and correlated phenomena. Search for manifestation of quark-gluon degrees of freedom in collisions of relativistic nuclei and phase transitions in nuclei (SPHERE, FASA) and exotic resonances. Study of nuclear multifragmentation processes and hyper- and

-nuclei production (FASA, GIBS). The Nuclotron internal target experiments: two-arm EMCalorimeter, deuteron spin structure investigation (SPHERE). Cumulative particle production by tenzor polarized deuterons. Asymptotics in nuclear collisions, nucleon clusters. Development of data base for bubble chambers statistics. Detector development for relativistic heavy-ion experiments at the SPS (NA49), RHIC (PHENIX). Investigation of the ³He spin structure at RIKEN. Creation of some prototypes of front-end electronics for primary processing; some prototypes of a logic processor; interface and network modules to organize a multichannel multiprocessor data acquisition system. Some developments of LHE-oriented architectures to create the data acquisition system are proposed. Obtaining of the data on heat generation, neutron multiplication, balance and spectrum, fission and radiation capture integrals in the model uranium blanket and target-converter of the installation "Energy plus Transmutation". Studies of transmutation cross sections of radioactive nuclear wastes (iodine-129, neptunium-237 and plutonium-239).

Expected main results in 2002:

Publication of the results on studying the tenzor analyzing power A_yy for reaction of deuteron fragmentation into cumulative pions at nonzero angles.
Publication of the results on studying the A_t-dependence of cross-section of the reaction of fragmentation of deuterons into pions in the twice cumulative region.
Investigations of properties of the nuclear multifargmentation induced by relativistic carbon ions as a function of the beam energy. Beam tests of the upgraded 4-set-up (FASA-2).
Study of exotic nuclei interactions (He, Li, B neutron deficit isotopes) in emulsion including irradiations of emulsion stacks by newly prepared beams of secondary nuclei and data analysis.
Measurements and data analysis of spin effects of neutral meson production in polarized proton interactions. First experiments using the Nuclotron internal target to search for exotic eta-nucleus and multiquark state production.
Support of operation of the system for measuring the beam intensity at the Nuclotron.
Design of prototypes of two devices of nuclear electronics.
Design of prototypes of two devices in basic bus standards.
Design of the trigger system and data acquisition system for the stand to test CMS muon chambers.
Prototype target development for the future "Energy-Transmutation" project including thermometry, nuclear track detector, and activation techniques. Measurements of transmutation cross-sections of radioactive isotopes.
Investigation of the deuteron and ³He spin structure by using the polarized deuteron beam at the Nuclotron and RIKEN.

List of Activities

Activity or project

Spokespersons

Status

a) SPHERE

A. Litvinenko
V. Penev

Data taking

b) SPHERE (intern. target)

A. Litvinenko
V. Penev

Preparation

GIBS

J. Lukstins

Data taking

Study of spin effects
in relativistic nuclear
reactions

L. Zolin
A. Litvinenko

Data taking

FASA

V. Karnaukhov

Data taking

DELTA
(INR RAS-JINR)

V. Krasnov
P. Zarubin

Preparation
Data taking

NA49 (TOF)

A. Malakhov
G. Melkumov

Data taking

ELECTRONICS

V. Smirnov

Preparation
Data taking

LNS

V. Ladygin

Preparation
Data taking

Energy plus
Transmutation

M. Krivopustov

Preparation
Data taking

10.

SKAN-2

S. Afanasiev

Data taking

Collaboration
Country or international organization	City	Institute or Laboratory
Armenia	Yerevan	YerPhI
		YSU
Azerbaijan	Baku	IP ASA
Bulgaria	Sofia	US
		INRNE BAS
		CC BAS
		UCTM
CERN
Czech Republic	Prague	Charles Univ.
		CTU
	Plzen	"Skoda"
	Rhzehz	NPI ASCR
		NRI ASCR
Democratic People's Republic of Korea	Pyongyang	INE NCNR
Georgia	Tbilisi	TSU
		HEPI TSU
		IP ASG
Germany	Darmstadt	THD
	Karlsruhe	Univ.
	Marburg	PUM
	Siegen	Univ.
	Juelich	FZJ
Greece	Thessaloniki	AUT
Japan	Nagoya	Nagoya Univ.
	Osaka	RCNP OU
	Tsukuba	Univ.
	Wako	RIKEN
JINR	Dubna	DLNP
		LPP
		LIT
		BLTP
		FLNP
		DRRR
		SOD
Italy	Catania	Univ., INFN
	Turin	INFN
Kazakhstan	Almaty	PTI
		INP SNC RK
Mongolia	Ulaanbaatar	IPT MAS
		NUM
Poland	Cracow	NINP
	Lodz	UL
	Lublin	IP MCSU
	Otwock	SINS
	Warsaw	SINS
		WU
		ETI
		FP WUT
		IRE WUT
		IEP WU
Romania	Bucharest	Univ.
		IFIN-HH
		INOE2000
Russia	Gatchina	PNPI RAS
	Vladivostok	FESU
	Moscow	SRINP MSU
		LPI RAS
		SSC-ITEP
		MEPI
		SSC RRC KI
		VNIINM
	Novosibirsk	BINP RAS-SD
	Obninsk	SSR-IPPE
	Ozersk	"Mayak Plant"
	Protvino	SRC-IHEP
	St. Petersburg	BSTU
		KRI
	Sarov	RSR IEP
	Troitsk	INR RAS
Slovak Republic	Bratislava	CU
		IP SAS
	Kosice	UPJS
Sweden	Lund	Univ.
Ukraine	Kharkov	NSC KIPT
		KNU
		ISC
	Kiev	BITP NASU
		SC INR NASU
USA	Iowa City	UI
	Upton	BNL
Uzbekistan	Samarkand	SSU
	Tashkent	INP UAS
		Assoc."P.-S." PTI
Vietnam	Hanoi	IP NCST
Yugoslavia	Podgorica	Univ.

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