# Presentation: 053726

## Energy loss of heavy ions in dense plasma

***Energy loss of heavy ions in dense plasma***

***Goal:*****  ****	****	****To understand the interaction of heavy ions with ****	****	****	****hot, dense matter**
***Therefore:***** ****	****Study the charge state evolutions and energy loss of ****	****	****heavy ions interacting with solids ****(HMI)**** and plasma ****(G****SI).**
***Application:*****  ****	****Heavy Ion driven Inertial Confinement Fusion**
**	****	****Heavy Ion driven Material Processing**

## Outline

**Experimental setup at GSI**
**Plasma- and Laser diagnostic**
**pinhole cameras**
**X-ray spectroscopy**
**visible streak camera**
**laser interferometry**
**laser output sensor**
**PIC simulations of the laser-plasma interaction**
**Interaction of Ar ions with solid carbon foils****	**
**charge exchange cross sections**
**charge dependent stopping power S(q)**
**Outlook**

## Experimental setup at GSI

***Experimental setup at GSI***

- Ion bunches at 103 MHz
- FWHM = 3 ns

## ion beam

***Plasma diagnostic setup***

## Plasma diagnostic – pinhole camera

***Plasma diagnostic – pinhole camera***

- Magnifying pinhole camera

- pinhole camera

- Te ≈ 150 – 200 eV

- h > 300 eV

- h > 300 eV / 2 keV

## Plasma diagnostic – X-ray spectroscopy

***Plasma diagnostic – X-ray spectroscopy***

**time**

********

**C-foil m=500 ********g/cm****2**

**C****+5**

**C****+4**

**C****+4**

**C****+5**

**Ry**

**Ry**

**T****e****~70-100 eV**
**n****e****=10****19****-10****20**** cm****-3**

**T****e**:  I **Ly********/** I **He******
**n****e**** :  n ****max**** of Ry satellites**

## Plasma diagnostic – vis. streak camera

## Plasma diagnostic – laser interferometry

**Fringe shifts due to varying electron density, n****e**** ****<**** 10 ****20**** cm ****-3**

## Laser diagnostic

***Laser diagnostic***

-  Energy: 70 –110  J
-  Focus intensity profile

- Temporal profile
- Reflected light

## PIC simulation

***PIC simulation***

- ring focus #27i, r = 0.4 mm,
- FWHM = 0.4 mm

- t=6 ns

- t=8 ns

- t=10 ns

## Charge State Evolution of Ar in solid C

***Charge State Evolution of Ar in solid C***

- HMI Berlin
- Q3D: ΔE/E=1•10-4
- Exp: f(qi, qf, d) of
-         Ar, 4 MeV/u
- Theory:
- solution of the
- rate equations
**** cross sections
*e*-capture
- ionization
- excitation
- decay

*Blazevic et al., Phys. Rev. A, vol. 61, 032901*

## Charge dependent energy loss

- E of Ar @ 4 MeV/u in Carbon

## ΔE(q,d) + бi + MCS  S(q)

***Charge dependent stopping power S(q)***

-         _Theory__:_
- Sigmund/Schinner
-  **Phys. Scr.T92 (2001) 222**
- Schiwietz/Grande
-  **NIM B153 (1999) 1**
- Maynard
-  **NIM A 464 (2001) 86**
- Kaneko
-  **Phys.Rev. A49(4) (1994)2681**

*Blazevic et al., NIM B 190 (2002) 64*

## Outlook

** ****Upgrade ****the laser interferometry to ********= 256 nm, t****L****= 0.5 ns**
** ****4 frame pinhole camera, t****exp****= 3 ns**
** ****Improvement of the laser fo****c****us**
** ****Benchmarks for the PIC simulation of the plasma**
** ****Calculate the projectile ́s charge states evolution in plasma**
** ****Scale the charge exchange cross sections ****in**** solid **
**    ****matter to plasma conditions & **
**    ****solve the rate equations**
** ****nN-CTMC simulation of the ion-**
**    ****plasma interaction**
** ****Energy loss experiments with the **
**    ****PHELIX laser and hohlraum targets**

## PIC simulation

- ring focus #27d, r = 0.3 mm,
- FWHM = 0.4 mm

- t=8 ns

- t=9 ns

- t=10 ns

***PIC simulation***