2002-03 1

TE01-TE02 DLDS Elements

BINP-KEK

2002-03 2

2002-03 3

2002-03 4

Main parameters of TE01-TE02 DLDS

• Number of modes 2

• Operating modes TE01,TE02

• Main waveguide diameter 120 mm

• Node-to-node distance 56.3 m

• TE01 loss -0.001dB/m

• TE02 loss (measured) -0.004dB/m

• Average main waveguide loss of 4-node DLDS 3.5%

2002-03 5

56.3 m

56.3 m

56.3 m

8 Klystrons75 MW, 120 Hz

Beam direction

Circular Waveguide (Ø 120 mm)

Tap-off System

TE 01 - TE 02

Mode Launcher600 MW, 800 ns

TE 02 Mode Extractor

RF Structure, 85 MW, 70 Mv/m

TE 02 Mode Extractor

Super Hybrid

6 m

TE01 - TE02 2x2 DLDS system

2002-03 6

Basic Elements of TE01-TE02 DLDS

• H-Hybrid

• TE10-TE01 Converter

• TE01-TE02 Launcher

• TE01-TE02 Extractor

• 1:1 Power Splitter

• 1:2 Power Splitter

• 90o TE01 Bend

• Phase Shifter

2002-03 7

H-Hybrid. HFSS calculations.

S11

GHz

11.2 11.3 11.4 11.5 11.6 11.7

VS

WR

1.0

1.1

1.2

1.3

1.4

1.5

S13, S14

GHz

11.2 11.3 11.4 11.5 11.6 11.7

Tra

ns

mis

sio

n,

dB

-4.0

-3.5

-3.0

-2.5

-2.0

2002-03 8

H-Hybrid. High Power Model

2002-03 9

11 11.2 11.4 11.6 11.8 121

1.1

1.2

1.3

1.4

Frequency (GHz)

Por

t #1

VS

WR

1.1

1.2

11.424

11 11.2 11.4 11.6 11.8 124

3.5

3

2.5

2

transmission between port #1 and #2 (S12)transmission between port #1 and #4 (S14)

Frequency (GHz)

Tra

nsm

issi

on (

dB)

3

11.424

H-Hybrid. Low power RF test results

Hybrid port # 1 VSWR (S11) Transmission between ports 1 – 2 (S12) and 1 – 4 (S14)

2002-03 10

TE10-TE01 Mode Converter

Output diameter 46 mmLength 280 mm

2002-03 11

TE10-TE01 Mode Converter. HFSS Calculations

S11

GHz

11.2 11.3 11.4 11.5 11.6 11.7

VS

WR

1.00

1.05

1.10

1.15

1.20

1.25

1.30

S12

GHz

11.2 11.3 11.4 11.5 11.6 11.7

S1

2,

dB

-0.5

-0.4

-0.3

-0.2

-0.1

0.0

2002-03 12

TE10-TE01 Mode Converter. Low Power Model

2002-03 13

11.2 11.3 11.4 11.5 11.6 11.71

1.05

1.1

1.15

1.2

1.25

1.3

Frequency (GHz)

VS

WR

1.1

1.2

11.424

11.2 11.3 11.4 11.5 11.6 11.70.8

0.6

0.4

0.2

0

0.2

0 degrees45 degrees90 degrees

Frequency (GHz)

Tra

nsm

issi

on (

dB)

11.424

TE10-TE01 Mode Converter. Low power RF test results

SWR for the TE01 Mode ConverterTransmission from the choke-type TE01 converter

(Ø40mm circular waveguide) to the tested TE01 converter (Ø46mm circular waveguide) for tree angles between H-

plane of the WR90 inputs of these converters

2002-03 14

TE01-TE02 Mode Launcher TE02 Mode Extractor

2002-03 15

TE01-TE02 Launcher-Extractor. HFSS calculations.

2002-03 16

TE01-TE02 Mode Launcher

TE02 Mode Extractor

2002-03 17

Emax = 480kV/cm for 600MW

TE01-TE02 Mode Launcher-Extractor. HFSS calculations.

2002-03 18

Part of TE01-TE02 Launcher-Extractor

2002-03 19

TE01-TE02 Mode Launcher-Extractor. Low Power RF Model

2002-03 20

TE01-TE02 Mode Launcher-Extractor plus Overmoded Tapers.

2002-03 21

TE02 Mode Launcher and Extractor. Low Power RF Test Setup.

2002-03 22

11.2 11.3 11.4 11.5 11.6 11.71

1.1

1.2

1.3

1.4

port #1 (circular waveguide D38mm)port #2 (WR90)

Frequency (GHz)

VS

WR

1.1

1.2

11.424

11.2 11.3 11.4 11.5 11.6 11.71

1.1

1.2

1.3

1.4

port #1 (circular waveguide D38mm)port #2 (WR90)

Frequency (GHz)

VS

WR

1.1

1.2

11.424

VSWR of the TE01-TE02 Launcher VSWR of the TE02 Mode Extractor

TE01-TE02 Mode Launcher-Extractor. Low power RF test results.

2002-03 23

11.2 11.3 11.4 11.5 11.6 11.730

28

26

24

22

20

Frequency (GHz)

Tra

nsm

issi

on (

dB

)

11.424

11.2 11.3 11.4 11.5 11.6 11.730

28

26

24

22

20

Frequency (GHz)

Tra

nsm

issi

on (

dB

)

11.424

TE01-TE02 Mode Launcher-Extractor. Low power RF test results.

Isolation between port #1 and port #2 for the TE01-TE02 Launcher

Isolation between port #1 and port #2 for the TE02 Mode Extractor

2002-03 24

Transmitted TE01 Mode Power

GHz

11.30 11.35 11.40 11.45 11.50 11.55 11.60

Tra

ns

mit

ted

Po

we

r, %

90

92

94

96

98

100

Extracted TE02 Mode Power

GHz

11.30 11.35 11.40 11.45 11.50 11.55 11.60

Ex

tra

cte

d P

ow

er,

%

90

92

94

96

98

100

TE02 Mode Extractor. Low power RF test results.

2002-03 25

11.2 11.3 11.4 11.5 11.6 11.75

4.5

4

3.5

3

2.5

2

to port #1to port #2

Frequency (GHz)

Tra

nsm

issi

on (

dB) 3

11.424

11.2 11.3 11.4 11.5 11.6 11.75

4.5

4

3.5

3

2.5

2

to port #1to port #2

Frequency (GHz)

Tra

nsm

issi

on (

dB

) 3

11.424

TE01-TE02 Mode Launcher-Extractor. Low power RF test results.

Transmission from the TE01-TE02 Launcher port #1 to the TE02 Extractor port #1 and port #2

Transmission from the TE01-TE02 Launcher port #2 to the TE02 Extractor port #1 and port #2

2002-03 26

1/2 TE01 Power Splitter. HFSS Calculations.

2002-03 27

1/2 TE01 Power Splitter. Low Power RF Model.

2002-03 28

11.2 11.3 11.4 11.5 11.61

1.1

1.2

1.3

1.4

Frequency (GHz)

VS

WR

1.1

1.2

11.424

1/2 TE01 Power Splitter. Low Power RF Test Results.

SWR of the ½ TE01 Power Splitter

2002-03 29

11.2 11.3 11.4 11.5 11.6 11.70.3

0.35

0.4

0.45

0.5

0.55

0.6

0.65

0 degree60 degree

Frequency (GHz)

S12

0.5

11.424

11.2 11.3 11.4 11.5 11.6 11.70.3

0.35

0.4

0.45

0.5

0.55

0.6

0.65

0 degree60 degree

Frequency (GHz)

S13

0.5

11.424

1/2 TE01 Power Splitter. Low Power RF Test Results.

Squared transmission coefficient S12 for the TE01 1/2 Power Splitter for two angles between

H-plane of WR90 input of the TE01 converter and WR90 output #2 of the tested splitter.

Squared transmission coefficient S12 for the TE01 1/2 Power Splitter for two angles between

H-plane of WR90 input of the TE01 converter and WR90 output #3 of the tested splitter.

2002-03 30

1/3 TE01 Power Splitter. HFSS Calculations

S33

GHz

11.2 11.3 11.4 11.5 11.6 11.7

VS

WR

1.0

1.1

1.2

1.3

1.4

1.5

S31, S32

GHz

11.2 11.3 11.4 11.5 11.6 11.7

Sp

litt

ed

Po

we

r, %

0

10

20

30

40

50

60

70

80

90

100

2002-03 31

1/3 TE01 Power Splitter. Low Power RF Model.

2002-03 32

11.2 11.3 11.4 11.5 11.61

1.1

1.2

1.3

1.4

Frequency (GHz)

VS

WR

1.1

1.2

11.424

1/3 TE01 Power Splitter. Low Power RF Test Results.

SWR of the 1/3 TE01 Power Splitter

2002-03 33

11.2 11.3 11.4 11.5 11.6 11.70.2

0.25

0.3

0.35

0.4

0.45

0 degree90 degree

Frequency (GHz)

S1

2

1

3

11.424

11.2 11.3 11.4 11.5 11.6 11.70.5

0.55

0.6

0.65

0.7

0.75

0 degree90 degree

Frequency (GHz)

S13

2

3

11.424

1/3 TE01 Power Splitter. Low Power RF Test Results.

Squared transmission coefficient S12 for the TE01 1/3 Power Splitter for two angles between

H-plane of WR90 input of the TE01 converter and WR90 output #2 of the tested splitter.

Squared transmission coefficient S12 for the TE01 1/3 Power Splitter for two angles between

H-plane of WR90 input of the TE01 converter and WR90 output #3 of the tested splitter.

2002-03 34

90o TE01 Bend. HFSS Calculations.

R=91

49

2002-03 35

90o TE01 Bend. Low Power RF Model.

2002-03 36

11.30 11.35 11.40 11.45 11.50 11.55 11.6099.50

99.55

99.60

99.65

99.70

99.75

99.80

99.85

99.90

99.95

100.00

TE01

- mode purity at the output of 90-degree Bend

Tra

smit

ted

Pow

er,

[ %

]

Frequency, [ GHz ] 11.30 11.35 11.40 11.45 11.50 11.55 11.60

0.0

0.1

0.2

0.3

0.4

0.5

Undesirable modes composition at the output ofTE

01 90-degree Bend

Tra

smit

ted

Pow

er,

[ %

]

Frequency, [ GHz ]

- TE11

mode - TE

21 mode

- TE31

mode

90o TE01 Bend. Low Power RF Test Results.

2002-03 37

Quasi-pulse measurement with long pipe

The measurements of propagation of pure TE01 and TE02 modes.

Measurements layout:

2002-03 38

Layout in tunnel:

2002-03 39

Result of measurements:

Tapers + Line + Short

ns

-100 0 100 200 300 400 500 600 700 800 900 1000

Am

pl

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

1.1

InputTE01_line_shortTE02_line_short

TE01 one-way efficiency 98.54%TE02 one-way efficiency 95.20%

Loss:TE01 - 1.46% (theory 1.18% )

TE02 - 5.75% (theory 4.31%)

2002-03 40

Measurements of TE01-TE02 Launcher-Extractor performances

2002-03 41

‘No long pipe’ setup:

2002-03 42

TE01 output

GHz

11.374 11.399 11.424 11.449 11.474

TE

01

po

rt,

po

we

r

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

Phase 0O

Phase 180O

TE02 output

GHz

11.374 11.399 11.424 11.449 11.474

TE

02

po

rt,

po

we

r

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

Phase 0O

Phase 180O

Measured efficiency of launching and extraction of TE01 mode 97.1%

Measured efficiency of launching and extraction of TE02 mode 97%

Theoretical estimated efficiency 97%

Results of measurements

2002-03 43

Measurements with long pipe.

2002-03 44

Obtained results are discrepant. The reasons are not clear enough. One of them can be low quality of backward WR90 waveguide. Measurements are going to be repeated in end of June.

As preliminary results can be taken ones from the measurements of below setup:

2002-03 45

Results of measurements:

TE01_Taper + D1_extr.

ns

-100 0 100 200 300 400 500 600 700 800 900 1000

Am

p.

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

1.1

InputPort1 - load, Port2 - loadPort1 - short, Port2 -loadPort1 - load, Port2 - short

TE02_Taper + D1_extr.

ns

-100 0 100 200 300 400 500 600 700 800 900 1000

Am

pl

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

1.1

InputPort1 - load, Port2 - loadPort1 - load, Port2 - shortPort1 - short, Port2 - load

TE01_Taper + D2_extr.

ns

-100 0 100 200 300 400 500 600 700 800 900 1000

Am

p.

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

1.1

InputPort1 - load, Port2 - loadPort1 - short, Port2 -load

TE02_Taper + D2_extr.

ns

-100 0 100 200 300 400 500 600 700 800 900 1000

Am

pl

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

1.1

InputPort1 - load, Port2 - loadPort1 - load, Port2 - shortPort1 - short, Port2 - load

Device1; Efficiency of TE01 extr. 98.7 Device1; Efficiency of TE02 extr. 97.7

Device2; Efficiency of TE01 extr. 96.9 Device2; Efficiency of TE02 extr. 98.8

2002-03 46

Average efficiency of TE01 extraction 97.8%Average efficiency of TE02 extraction 98.2%

We can expect the efficiency of 2-mode DLDS (loss in pipe not included) ~ 96%