372596164

134

RIKKN Accel. Próg. Rep. 24 (1990)

Table 2. Output currents of the source.

							ECRIS ( NEOMAFIOS ) Ion Currents ( e									u A )						-1 1
Ion	Gas	Charge sute																						Remarks
		1 -	2 *	3 +	4 +	5 -	6 +	7	8 -	9+ 10 +		11 +	12 +'13 +		14 +	15 +	16 +'17 +		18 +'19 -		20 +	21 +122 +
* He	He	500	210	i			_i				1		i				1 1 ^1
" C	CO, .He	75	57		18	2.3 1							" i				r i I |
.. N	N,		O	63	E3	30	2.8	i 1					1			1
- O	O,		85	65		15	6.0 ' 0.25		I		i		i				}
2 a	Ne	215	96	82 ;	65	35	6.5	i i				■ i-1-,- liii					1
* Ar	Ar.O,		75	55 i	50		30	24	26	10		0.7	0.1 i				• i
^M Kr	Kr.O,	1		i	17.5	16	i		17	11.5' 9.0		6.8	i 3.7			15	1 1.0					_
* Xe	Xe.O, |				10	11	11	13.5	14	10 i 6.6			3.8	3.1	25	25		15	1.1
	!	i i			i					1					i			1		i
- Mg	0,					35		ea			i				I			1		!				MgO. d 4. rod
^r Al	O,	22		34	33		15	6.0	2.0	0.1	! 1				liii					i			AliO*. d 4. rod
■ Si	He i			15		33			1 1.0		V I			i i i i l 1 j									SiO,. d 3. rod
- Ca	o,		72	70	55		36	27	26.5 i 25.5			55	1.0 1		1		liii						1 CaO. d 5.7. rod
- Ti	o, i		5 2	1		15		14	1		65	4.4	i 0.3				i						Ti. d 2. rod
•' V	a i		2.5		7.5	12	12	12		7.5	4.8	2.4			_1_			i					V. d l. 2 rods
^u Cr	O, l		9		27	30	32.8	25.5	15	8.3 I 5.8		3.6	2.0 ^1		0.3			i						Cr. d 2. rod
“ Mn	a		.		51	68	60	42	19	9 4		2.6	0.8 1		i i			_i___				1		d 4. T. crucible
“ Fe	0,.He					15	15			11.3' 82		4.6 ' 3.0 ' 1.0					1 1			!				Fe. d l. rod
t“ Ni	Ot.He		4.0	4.8 :	52	8.0	12	13.5	14	11 1 8.0			1.7 10.75		0.25		i -			_		_		Ni. dl. 2 rods
“ Co	He		3.6	7.0	15.6	26	25.6	19	11	6.0 2.2			1				!		i ni				Co. d 1. 2 rods
- Cu	O, l*		1 9.0			17	19	17	15	i 6.5		4.0				i •			_!___				d 4. Ta crucible
** Zn	He	1 27		32				26		8.3 ' 0.4			I			1 ^1								d 4. Ta cruciblel
’* Ge	O, i	15	1.8	ao		43	5.5	6.3	ao	4.6 2.6		15	05 0.27		f j| i									d 4. Ta crucible'
• Zr	o, 11				1.0		1.7	1.9	2.6	42 l 4.5		5.0	6.5		2.6 i		0.8	_!_!_!_						Zr. d 2, rod
" Nb	ra			11	19	23	13	9.5	7	7 i 7		5	3 1.7		0.6	i		!						Nb. d 3. rod
" Mo	0,			i 3.8		5.0		7.5 1		3.5 3.5 1 3.0			10.651			i								Mo. d 2. rod
~ Ag	He			12 \	2.6	5 2		8.4	8.7	9.0 7.3		6.5	4.9	2.5	1.6	15	0.9	0.4 i		n				Ag. d 3. rod
^,u In	_ o, J!__			10 1	21	31	24	22	16	13.5 105		7.5	53	45	3	2	15	0.6	E3					d 4. Ta crucible
- Sn	0,.He 1	L		s	3.0	52 i 5.7		6.6	10	7.0 |		4.2	2.7 i 1.8		1.0		05							d 4. Ta crudble
] Ta	0.			1		8.5		18	19	19 !		14	12		8.2		5.5 5.0		4.3	3.0	2.0	1.1	0.6 Ta. d 1. rod
r w	o, r		i !			0.9	1.0	1.4	1.7	2.4 ,		"1	4.0 !		3.0	1.5 i 0.9 i 0.5				05		1		W. d 1. rod
* Aul	o,-				i _1_		13.7		19.2	165.13.7			10.0 6.0			4.3	4.0 ! 2.6		1.5	0.8	0.4	05 T		d 4. Ta crucible
- Pb	O, l|			1		7.7		10 1 13.8		13.3 108		8.3			55	^1 3.5			1.7	1.0 i 05		05 ! 0.1		d 4. Ta crudble|
- B.	He			•			3.3		8.3	10.0i 8.7		7.6	5.6 i		5.6		3.6 2.3		1.4	0.87 1 0.45		0.32 0.1		d 4. Ta cruciblel

NEOMAFIOS showed very steady operation in ion production of gaseous elements, and the plasma charnber scarcely needs cleaning. Three methods were examined to insert a solid materiał into the plasma: a pure metal rod (1-3 mm in diameter and 50 mm in length), an oxide ceramics rod (3-5.7 mm in diameter and 40 mm in length), and a power con-tained in a smali tantalum crucible (4 mm in diameter, 0.3 mm in thickness, and 50 mm in length). Ions of most solid elements can be produced with one of these methods. For ferromagnetic materials such as Fe, Ni, and Co, the samples were madę of two twisted wires (each 1 mm in diameter) in order to overcome bending moment due to the magnetic force. Results of the test are summarized

in Table 2.

The ECR ion source took 6-12 hours to restore steady operation once the plasma charnber was exposed to the atmosphere. We will have to con-sider about it in beam time arrangements when we use such ion species that reąuire cleaning of the plasma charnber.

The RILAC beam service with the ECR ion source will start in the middle of January 1991.

References

1) G. Melin et al.: Proc. Int. Conf. on Physics of Multiply Charged Ions and Int. Workshop on E.C.R. łon Sources, Grenoble, France, p. 673 (1988).