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1 ICIS21_Presentation_v0 - PPT Presentation

Charge Breeder at GANIL metal chargebred elements L Maunoury GANIL maunouryganilfr 1 Outline 1 SP1 Charge Breeder 2 OFF line results 3 Charge breeding using molecules ID: 932238

ion charge breeder breeding charge ion breeding breeder source line febiad curves conclusion outlooks spiral1 molecules4 results anode sp1

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Slide1

1

ICIS21_Presentation_v0

Charge Breeder at GANIL:

metal

charge-bred elements

L.

Maunoury

GANIL

maunoury@ganil.fr

Slide2

1

Outline

1 - SP1 Charge Breeder

2 - OFF line results

3 - Charge breeding using molecules4 -

D

V

curves regarding 1+ ion source

5

-

SPIRAL1 outlooks

6

-

Conclusion

Slide3

1

1 - SP1 Charge Breeder

2 - OFF line results

3

- Charge breeding using molecules4 - D

V

curves regarding 1+ ion source

5

-

SPIRAL1 outlooks

6

-

Conclusion

Slide4

2

FEBIAD TISS

Nanogan

TISS

1+ ions

N+ ions

Ion gun

Slide5

FEBIAD => two modes

SI => Surface ionizationP => Plasma

FEBIAD TISS

Cathode

Anode

Mode SI

I

cathode

=

240A

U

anode

= 0V

P

I

cathode

=

290A

U

anode

=

140V

3

Slide6

4

Fixed HT

CB

D

V

Ion

Gun-CB

> 0

D

V and

D

V curves

Slide7

5

1 - SP1 Charge Breeder

2 - OFF line results

3

- Charge breeding using molecules4 - D

V

curves regarding 1+ ion source

5

-

SPIRAL1 outlooks

6

-

Conclusion

Slide8

6

Total CB

efficiency43% for both

Effect of the beam optics

Slide9

7

Effect of the buffer gas

Total CB

efficiency

78% for H2

Slide10

8

1 - SP1 Charge Breeder

2 - OFF line results

3

- Charge breeding using molecules4 - D

V

curves regarding 1+ ion source

5

-

SPIRAL1 outlooks

6

-

Conclusion

Slide11

9

Lowering the release time

Chemical

selection

= Isobaric contamination

Motivations

Main question to reply:

Does the performances of charge breeder will change ?

Fine for EBIS charge

breeder

SnS

1+

O. Kester et al., NIMB 2008

8

BF

2

1

+

/

8

B

q+

J.

Ballof

et al., EPJA 2019

CO

1

+

/

C

4+

J. Pitters et al., NIMB 2020

Trials

with ECRIS charge breeder

LaO

/ La

23

+

(

2.7%)

P.

Delahaye et al.,

NIMB 2008

CO-CO

2

/ C

2,3+

(

10%)

L.

Maunoury et al.,

RSI 2014

Slide12

10

Monocharged

Molecular

Beam

Gas injection

SF

6

No buffer gas

Microwave injection

10GHz

“

Biased guide”

Slide13

11

Source tuning

=>

19F1+

Slide14

12

Source tuning

=>

32S1

+

Slide15

13

Source tuning =>

32+19x

SFx1+

Slide16

14

Charge breeding versus emittance

Slide17

15

Charge breeding from SF

x

1+

to 32S11+

Norm + shift

Slide18

16

Charge breeding from SF

x

1+

to 19F5+

Norm + shift

Slide19

D

v

max and FWHM evolutions

17

Slide20

18

1 - SP1 Charge Breeder

2 - OFF line results

3

- Charge breeding using molecules4 - D

V

curves regarding 1+ ion source

5

-

SPIRAL1 outlooks

6

-

Conclusion

Slide21

19

D

V ~ -124.7VFWHM ~ 12VCB ~ 13% DV ~ 7.3VFWHM ~ 11VCB ~ 8%

DV ~ -20.2VFWHM ~ -18.7VCB ~ 2%

Slide22

20

D

V ~ 7.3VFWHM ~ 11VCB ~ 8% DV ~ 5.5VFWHM ~ 7VCB ~ 11.7%

Fig 7. L. Maunoury RSI

2016Ion Gun - 2015 LPSC experimentNo sheath / DE ~ 2eVFEBIAD SINo sheath / DE ~ 4eV

Slide23

21

Nanogan

– ECR ion sourceSheath / DE ~ 5eVIons too energetic => plasma potentialPlasma potential = -DVMax

Nanogan + DVMax Ion_gun

=> 20.2V + 5.5V = 25.7VDV ~ -20.2VFWHM ~ 18.7V CB ~ 2%

Slide24

22

DV ~ 7.3VFWHM ~ 11V

CB ~ 8%

Fixed HT

CB

D

V

FEBIAD-CB

< 0

U

anode

> 0

Slide25

23

FEBIAD P

Fig 3. L. Penescu RSI

2010Uanode

ions  Uanode applied9.8VDV ~ -124.7VFWHM ~ 12VCB

~

13%

U

anode

applied

= 140V

Same logic as NANOGAN

U

anode

applied

= -

D

V

Max

FEBIAD P

+

D

V

Max

Ion_gun

=>

U

anode

applied

= 124.7V + 5.5V =

130.2V!

Slide26

24

1 - SP1 Charge Breeder

2 - OFF line results

3

- Charge breeding using molecules4 - D

V

curves regarding 1+ ion source

5

-

SPIRAL1 outlooks

6

-

Conclusion

Slide27

25

2021 FEBIAD

=> on-line measurements for 42Cl (T1/2 = 6.8 s) 42Cl1+ => total TISS efficiency 4.1 10-3 (H42Cl)1+ => total TISS efficiency 3.1 10

-3Eliminate all the M = 42 contaminants !!

2004 ECR Minimono (P. Jardin RSI 2004) => on-line measurements of: (H34Cl)

1

+

(32

mn

)

(H

31

S)

1

+

(2.572 s) / total

TISS efficiency

31

S

1+

(H

30

P)

1

+

(2.49 s)

What’s about hydride compounds?

CF

4

/ CH

4

Slide28

26

1 - SP1 Charge Breeder

2 - OFF line results

3

- Charge breeding using molecules4 - D

V

curves regarding 1+ ion source

5

-

SPIRAL1 outlooks

6

-

Conclusion

Slide29

27

Not only alkali elements with SP1CB

SP1CB has demonstrated its ability to work with molecules BUT “open questions”

Optimum

DV understood regarding 1+ ion sourcesSome room for improving the facility

Slide30

Slide31

BACKSLIDE

Slide32

Charge breeding versus emittance

Norm + shift

Slide33

Charge breeding from

32

S1+Norm + shift

(a.u.)

Slide34

56

Fe1+

/15+FEBIAD Plasma10kV – 400W – He buffer gas

Slide35

D

V FEBIAD Plasma mode

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