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Tessa Charles Australian Synchrotron / Monash University 1 Bunch Compression Schemes for X-band FELs.

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Presentation on theme: "Tessa Charles Australian Synchrotron / Monash University 1 Bunch Compression Schemes for X-band FELs."— Presentation transcript:

1 Tessa Charles Australian Synchrotron / Monash University 1 Bunch Compression Schemes for X-band FELs

2 2 AXXS (Australian X-band X-ray Source) Upgrade the storage ring with an MBA lattice with  < 1 nm rad, in the existing tunnel with the same source points. Build a 3 GeV x-band linac to inject a low emittance beam into the storage ring. Use a second x-band linac to generate a 6 GeV beam for an XFEL. CLIC Workshop 2015 – Tessa Charles - 2

3 Comparison of bunch compression schemes – Magnetic Chicane (most FELs) – Double Achromat (e.g. MAX IV) – Harmonic Linearization – Optical Linearization Today’s talk Why these schemes Preliminary simulation results Bunch compressors we’re considering CLIC Workshop 2015 – Tessa Charles - 3

4 Magnetic Chicane R56 0 δE z Chirped, linearized beam Compressed beam CLIC Workshop 2015 – Tessa Charles - 4

5 AXXS (Australian X-band X-ray Source) - Two Designs 1.Base line design: S-band with X-band structure for linearizing before BC1 1.Alternative design being considered: X-band the whole way Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station S-band ~40 MV/m 6 x 4 m X-band ~65 MV/m 4 x 0.75 m X-band ~65 MV/m 90 x 0.75 m ~150 m Gun Injector BC2 Dogleg Linac2 Undulator Linac1 Experimental Station X-band ~65 MV/m 10 x 0.75 m X-band ~65 MV/m 4 x 0.75 m X-band ~65 MV/m 90 x 0.75 m ~110 m BC1 CLIC Workshop 2015 – Tessa Charles - 5

6 AXXS (Australian X-band X-ray Source) CLIC Workshop 2015 – Tessa Charles - 6

7 How to linearize the longitudinal phase space? Harmonic vs Optical linearization CLIC Workshop 2015 – Tessa Charles - 7

8 All X-band design One way to linearize the longitudinal phase - Optical linearization CLIC Workshop 2015 – Tessa Charles - 8

9 Optical Linearization - Theoretical description Optimal compression => When higher order terms are considered… Bunch length after compression (to 1 st order): Y. Sun et al. Phys. Rev. ST Accel. Beams 17, 110703 (2014) CLIC Workshop 2015 – Tessa Charles - 9

10 Optical Linearization - Choosing R56, T566 & U5666 CLIC Workshop 2015 – Tessa Charles - 10

11 Optical Linearization Linac1 end / BC1 entrance BC1 end Linac2 end / BC2 entrance BC2 end Y. Sun et al. Phys. Rev. ST Accel. Beams 17, 110703 (2014) CLIC Workshop 2015 – Tessa Charles - 11

12 Optical Linearization Y. Sun et al. Phys. Rev. ST Accel. Beams 17, 110703 (2014) T566 = 80 mm R56 = 17 mm CLIC Workshop 2015 – Tessa Charles - 12

13 Positive R56 & positive T566  Self Linearizing BC1: R 56 = 3.23 cm T 566 = 9.26 cm BC2: R 56 = 2.6 c m T 566 = -17.8 cm MAX IV Detailed Design Report on the MAX IV Facility (2010) CLIC Workshop 2015 – Tessa Charles - 13

14 Preliminary Simulation Results Four simulations of linac compression schemes compared. A work in progress CLIC Workshop 2015 – Tessa Charles - 14

15 01 – BASE LINE DESIGN Inc. 12 GHz linearizer CLIC Workshop 2015 – Tessa Charles - 15

16 S band with X band structure for linearizing before BC1 Base line design (S-band w X-band linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station S-band ~40 MV/m X-band ~65 MV/m X-band ~65 MV/m X-band 12 GHz Initial beam parameters: m e c (pCentral) = 257.65 Q = 2.5x10 -10 C Bunch length (rms) = 2.64 ps Simulations based of Andrea Latina’s elegant files. CLIC Workshop 2015 – Tessa Charles - 16

17 S band with X band structure for linearizing before BC1 Base line design (S-band w X-band linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station S-band ~40 MV/m X-band ~65 MV/m X-band ~65 MV/m X-band 12 GHz CLIC Workshop 2015 – Tessa Charles – 17

18 S band with X band structure for linearizing before BC1 Base line design (S-band w X-band linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station S-band ~40 MV/m X-band ~65 MV/m X-band ~65 MV/m X-band 12 GHz CLIC Workshop 2015 – Tessa Charles - 18

19 S band with X band structure for linearizing before BC1 Base line design (S-band w X-band linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station S-band ~40 MV/m X-band ~65 MV/m X-band ~65 MV/m X-band 12 GHz CLIC Workshop 2015 – Tessa Charles - 19

20 S band with X band structure for linearizing before BC1 Base line design (S-band w X-band linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station S-band ~40 MV/m X-band ~65 MV/m X-band ~65 MV/m X-band 12 GHz CLIC Workshop 2015 – Tessa Charles - 20

21 S band with X band structure for linearizing before BC1 Base line design (S-band w X-band linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station S-band ~40 MV/m X-band ~65 MV/m X-band ~65 MV/m X-band 12 GHz CLIC Workshop 2015 – Tessa Charles - 21

22 S band with X band structure for linearizing before BC1 Base line design (S-band w X-band linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station S-band ~40 MV/m X-band ~65 MV/m X-band ~65 MV/m X-band 12 GHz Compression Ratio after BC1: 8.34 CLIC Workshop 2015 – Tessa Charles - 22

23 S band with X band structure for linearizing before BC1 Base line design (S-band w X-band linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station S-band ~40 MV/m X-band ~65 MV/m X-band ~65 MV/m X-band 12 GHz CLIC Workshop 2015 – Tessa Charles - 23

24 S band with X band structure for linearizing before BC1 Base line design (S-band w X-band linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station S-band ~40 MV/m X-band ~65 MV/m X-band ~65 MV/m X-band 12 GHz CLIC Workshop 2015 – Tessa Charles - 24

25 Base line design (S-band w X-band linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station S-band ~40 MV/m X-band ~65 MV/m X-band ~65 MV/m X-band 12 GHz CLIC Workshop 2015 – Tessa Charles - 25

26 Base line design (S-band w X-band linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station S-band ~40 MV/m X-band ~65 MV/m X-band ~65 MV/m X-band 12 GHz CLIC Workshop 2015 – Tessa Charles - 26

27 Base line design (S-band w X-band linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station S-band ~40 MV/m X-band ~65 MV/m X-band ~65 MV/m X-band 12 GHz CLIC Workshop 2015 – Tessa Charles - 27

28 S band with X band structure for linearizing before BC1 Base line design (S-band w X-band linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station S-band ~40 MV/m X-band ~65 MV/m X-band ~65 MV/m X-band 12 GHz CLIC Workshop 2015 – Tessa Charles - 28

29 Base line design (S-band w X-band linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station S-band ~40 MV/m X-band ~65 MV/m X-band ~65 MV/m X-band 12 GHz End of linac: Compression Ratio: 100.80 CLIC Workshop 2015 – Tessa Charles - 29

30 Base line design (S-band w X-band linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station S-band ~40 MV/m X-band ~65 MV/m X-band ~65 MV/m X-band 12 GHz CLIC Workshop 2015 – Tessa Charles - 30

31 Base line design (S-band w X-band linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station S-band ~40 MV/m X-band ~65 MV/m X-band ~65 MV/m X-band 12 GHz CLIC Workshop 2015 – Tessa Charles - 31

32 02 – ALL X-BAND Without a harmonic linearizer CLIC Workshop 2015 – Tessa Charles - 32

33 CLIC Workshop 2015 – Tessa Charles - 33 02 All X-band (w/o harmonic linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station X-band ~65 MV/m X-band ~65 MV/m X-band ~65 MV/m

34 02 All X-band (w/o harmonic linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station X-band ~65 MV/m X-band ~65 MV/m X-band ~65 MV/m CLIC Workshop 2015 – Tessa Charles - 34

35 02 All X-band (w/o harmonic linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station X-band ~65 MV/m X-band ~65 MV/m X-band ~65 MV/m CLIC Workshop 2015 – Tessa Charles - 35

36 02 All X-band (w/o harmonic linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station X-band ~65 MV/m X-band ~65 MV/m X-band ~65 MV/m CLIC Workshop 2015 – Tessa Charles - 36

37 02 All X-band (w/o harmonic linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station X-band ~65 MV/m X-band ~65 MV/m X-band ~65 MV/m CLIC Workshop 2015 – Tessa Charles - 37

38 02 All X-band (w/o harmonic linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station X-band ~65 MV/m X-band ~65 MV/m X-band ~65 MV/m CLIC Workshop 2015 – Tessa Charles - 38

39 Compression Ratio after BC1: 9.35 02 All X-band (w/o harmonic linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station X-band ~65 MV/m X-band ~65 MV/m X-band ~65 MV/m CLIC Workshop 2015 – Tessa Charles - 39

40 02 All X-band (w/o harmonic linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station X-band ~65 MV/m X-band ~65 MV/m X-band ~65 MV/m CLIC Workshop 2015 – Tessa Charles - 40

41 02 All X-band (w/o harmonic linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station X-band ~65 MV/m X-band ~65 MV/m X-band ~65 MV/m CLIC Workshop 2015 – Tessa Charles - 41

42 02 All X-band (w/o harmonic linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station X-band ~65 MV/m X-band ~65 MV/m X-band ~65 MV/m CLIC Workshop 2015 – Tessa Charles - 42

43 02 All X-band (w/o harmonic linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station X-band ~65 MV/m X-band ~65 MV/m X-band ~65 MV/m CLIC Workshop 2015 – Tessa Charles - 43

44 02 All X-band (w/o harmonic linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station X-band ~65 MV/m X-band ~65 MV/m X-band ~65 MV/m CLIC Workshop 2015 – Tessa Charles - 44

45 02 All X-band (w/o harmonic linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station X-band ~65 MV/m X-band ~65 MV/m X-band ~65 MV/m CLIC Workshop 2015 – Tessa Charles - 45

46 End of linac: Compression Ratio: 93.52 02 All X-band (w/o harmonic linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station X-band ~65 MV/m X-band ~65 MV/m X-band ~65 MV/m CLIC Workshop 2015 – Tessa Charles - 46

47 02 All X-band (w/o harmonic linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station X-band ~65 MV/m X-band ~65 MV/m X-band ~65 MV/m CLIC Workshop 2015 – Tessa Charles - 47 Optics not yet optimized

48 Compression Ratio: 93.52 02 All X-band (w/o harmonic linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station X-band ~65 MV/m X-band ~65 MV/m X-band ~65 MV/m CLIC Workshop 2015 – Tessa Charles - 48

49 03 – ALL X-BAND Inc. 24 GHz linearizer CLIC Workshop 2015 – Tessa Charles - 49

50 03 All X-band (24GHz linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station X-band 12 GHz X-band ~65 MV/m X-band ~65 MV/m X-band 24 GHz CLIC Workshop 2015 – Tessa Charles - 50

51 03 All X-band (24GHz linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station X-band 12 GHz X-band ~65 MV/m X-band ~65 MV/m X-band 24 GHz CLIC Workshop 2015 – Tessa Charles - 51

52 03 All X-band (24GHz linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station X-band 12 GHz X-band ~65 MV/m X-band ~65 MV/m X-band 24 GHz CLIC Workshop 2015 – Tessa Charles - 52

53 03 All X-band (24GHz linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station X-band 12 GHz X-band ~65 MV/m X-band ~65 MV/m X-band 24 GHz CLIC Workshop 2015 – Tessa Charles - 53

54 03 All X-band (24GHz linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station X-band 12 GHz X-band ~65 MV/m X-band ~65 MV/m X-band 24 GHz CLIC Workshop 2015 – Tessa Charles - 54

55 CLIC Workshop 2015 – Tessa Charles - 55 Compression Ratio after BC1: 10.19 Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station X-band 12 GHz X-band ~65 MV/m X-band ~65 MV/m X-band 24 GHz 03 All X-band (24GHz linearizer)

56 Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station X-band 12 GHz X-band ~65 MV/m X-band ~65 MV/m X-band 24 GHz CLIC Workshop 2015 – Tessa Charles - 56

57 03 All X-band (24GHz linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station X-band 12 GHz X-band ~65 MV/m X-band ~65 MV/m X-band 24 GHz CLIC Workshop 2015 – Tessa Charles - 57

58 03 All X-band (24GHz linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station X-band 12 GHz X-band ~65 MV/m X-band ~65 MV/m X-band 24 GHz CLIC Workshop 2015 – Tessa Charles - 58

59 03 All X-band (24GHz linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station X-band 12 GHz X-band ~65 MV/m X-band ~65 MV/m X-band 24 GHz CLIC Workshop 2015 – Tessa Charles - 59

60 03 All X-band (24GHz linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station X-band 12 GHz X-band ~65 MV/m X-band ~65 MV/m X-band 24 GHz CLIC Workshop 2015 – Tessa Charles - 60

61 03 All X-band (24GHz linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station X-band 12 GHz X-band ~65 MV/m X-band ~65 MV/m X-band 24 GHz CLIC Workshop 2015 – Tessa Charles - 61

62 03 All X-band (24GHz linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station X-band 12 GHz X-band ~65 MV/m X-band ~65 MV/m X-band 24 GHz End of linac: Compression Ratio: 103.86 CLIC Workshop 2015 – Tessa Charles - 62

63 03 All X-band (24GHz linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station X-band 12 GHz X-band ~65 MV/m X-band ~65 MV/m X-band 24 GHz Along the length of the linac CLIC Workshop 2015 – Tessa Charles - 63

64 04 – ALL X-BAND Inc. 36 GHz linearizer CLIC Workshop 2015 – Tessa Charles - 64

65 04 All X-band (36 GHz linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station X-band 12 GHz X-band ~65 MV/m X-band ~65 MV/m X-band 36 GHz CLIC Workshop 2015 – Tessa Charles - 65

66 04 All X-band (36 GHz linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station X-band 12 GHz X-band ~65 MV/m X-band ~65 MV/m X-band 36 GHz CLIC Workshop 2015 – Tessa Charles - 66

67 04 All X-band (36 GHz linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station X-band 12 GHz X-band ~65 MV/m X-band ~65 MV/m X-band 36 GHz CLIC Workshop 2015 – Tessa Charles - 67

68 04 All X-band (36 GHz linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station X-band 12 GHz X-band ~65 MV/m X-band ~65 MV/m X-band 36 GHz CLIC Workshop 2015 – Tessa Charles - 68

69 04 All X-band (36 GHz linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station X-band 12 GHz X-band ~65 MV/m X-band ~65 MV/m X-band 36 GHz CLIC Workshop 2015 – Tessa Charles - 69

70 04 All X-band (36 GHz linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station X-band 12 GHz X-band ~65 MV/m X-band ~65 MV/m X-band 36 GHz Compression Ratio after BC1: 52.65 CLIC Workshop 2015 – Tessa Charles - 70

71 04 All X-band (36 GHz linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station X-band 12 GHz X-band ~65 MV/m X-band ~65 MV/m X-band 36 GHz CLIC Workshop 2015 – Tessa Charles - 71

72 04 All X-band (36 GHz linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station X-band 12 GHz X-band ~65 MV/m X-band ~65 MV/m X-band 36 GHz CLIC Workshop 2015 – Tessa Charles - 72

73 04 All X-band (36 GHz linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station X-band 12 GHz X-band ~65 MV/m X-band ~65 MV/m X-band 36 GHz CLIC Workshop 2015 – Tessa Charles - 73

74 04 All X-band (36 GHz linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station X-band 12 GHz X-band ~65 MV/m X-band ~65 MV/m X-band 36 GHz CLIC Workshop 2015 – Tessa Charles - 74

75 04 All X-band (36 GHz linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station X-band 12 GHz X-band ~65 MV/m X-band ~65 MV/m X-band 36 GHz CLIC Workshop 2015 – Tessa Charles - 75

76 04 All X-band (36 GHz linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station X-band 12 GHz X-band ~65 MV/m X-band ~65 MV/m X-band 36 GHz CLIC Workshop 2015 – Tessa Charles - 76

77 End of linac: Compression Ratio: 110.98 Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station X-band 12 GHz X-band ~65 MV/m X-band ~65 MV/m X-band 36 GHz 04 All X-band (36 GHz linearizer) CLIC Workshop 2015 – Tessa Charles - 77

78 Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station X-band 12 GHz X-band ~65 MV/m X-band ~65 MV/m X-band 36 GHz Along the length of the linac: 04 All X-band (36 GHz linearizer) CLIC Workshop 2015 – Tessa Charles - 78

79 04 All X-band (36 GHz linearizer) Gun Injector BC1 BC2 Dogleg Linac2 Undulator Linac1 Experimental Station X-band 12 GHz X-band ~65 MV/m X-band ~65 MV/m X-band 36 GHz Along the length of the linac: CLIC Workshop 2015 – Tessa Charles - 79

80 Comparison of the 4 simulated scenarios End of linac comparison CLIC Workshop 2015 – Tessa Charles - 80 01 S-band w X-band linearizer (Base line)02 all X-band w/o linearizer 03 all X-band w 24 GHz linearizer04 all X-band w 36 GHz linearizer

81 Where to from here… Further optimization of chicane simulations and inclusions of additional effects (CSR) & optimize optics Look into beam parameters optimal for photon production Investigate optical linearization in chicanes Investigate optical linearization in double achromats CLIC Workshop 2015 – Tessa Charles - 81

82 Thank you

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