·•·

THIS DOCUMENT IS BEST QUALITY AVAILABLE. THE COPY

FURNISHED TO DTIC CONTAINED

A SIGNIFICANT NUMBER OF

PAGES WHICH DO NOT

REPRODUCE LEGIBLYo

ML to. V&t

US GOTOMMM 4nm'mg», f^iikcmkmm^ m 9tbm 4mm Mt AM • <iili«rni| whw4 |pw—I finmn«»! ■fiwiiif. dM — ■»>■■■ iHUiy wm of •yjfMfaa ■fcimimj mi+mlm

m tM Mf r«f Mffliai,*« My 4M*M|». ifcittc ■!<—■. «r to MI » fct mfßtiti bf if ItcMU« «» MUVMM. M to My ■■«■w Ufiwf i

fiatmm, M c(M«ryM| «of H|fkM «#

AM «if to My 9f M o toMi

b.w

W* •# t«»%H&«l I*

MM

Aflß^UCTB

i. arnnmmrm

in tueh a UM c«atlp»1« circuit IM« bM« Ml«f^4 for OM an UM «l^droA «liefe

MOMr ttet UM t^llt'dJ« and plin» of UM cr<wt«g «•*• «: C4

Ircult UUimctton UngUi enn iw i*n«ur«4 T1M r»«ulu of U'.a

«111 b« of ytnont i%lm im J9*imi*it* UM «MJ »m—u™ aff*rtt«g

trcult tffWmcttoi. CurrMt rvoulu of UMor7 M4 «cyvrtwat

?•««« m U0 «^.t^an c^tet for U« «^pr«««;« of |^««tiu <»<{.;*•

JD If ft» oUMf MNMf««« of tan^nfeUllf %m** \mm* ' MMI *MI tmm '•*

fulinri «n«u^«t«M ««l •*».«*•<• «»f!..*«t«M •-• • •«.tw««;« •#

14« .• •*•>«•(

^■'Jt Cl

•fe-tff •« •» •!»•« >»«'«« —x< U n* ••

man i« • "»•<»^«gin CMMMi* 't«^i *•*• • ••*

favt «I «na ««wi •« *»• «an./-« • •/ M« M< «MI

a li«ML«at*M 'f %»• »..«A ••••• • •»> ••••rt« •

•»«

• • •

9. ACQUTTIC tftvi anncEfl

Tht obj*cUv« of this aw project i« to imrotifBt« tto proptrtUt

of »l roMV* «rowAtir wv« trftn*4u<*cr« 1A order to l^wim tfeotr MB*

vcrf.on •fflrlMr/ oat toadvidth; lb» ttolut of ihl« «orfc la dooerlbod.

U #i;o«.

«Mr«,: ?«••.•'«

. Ill .

:*BU or cojrrr3

rw vmumon

ftNturr ASS) AMLLna or vi.»

5. A.-v^ttc l^w :*rt

k i' 19 «I

. . .

OMMmi

This !• ;^rt«r:jr Otmiu» Report le. 11, for th# period of 1 l^gr

thro^|& 31 JuJjr 19^. Thl« report dMcrlbet projects eetlve la tho

third yeer of tfcfti rootrert.

At •».• pr»»«nt -..■o ttere ere ft*» project«, e« follow«:

1. Ceetipede ^T

2. Cst«aled-later%ct!jn Cjr«tron«

). Trer^vvr*e-«ev« 9\jd!««

%. ivfte-f.Aaao Sleilo«

9. Adoyotlr Iteve U»v: n«

T>* ^•«.••'-t» ist.ed *ar:;^t:ar. iHi^pr^«!«« *» TVr*»" Ofa« 'Ion-

{*r,.e&: Moleetrtc*;te«« TVT* äev« tcec caapl«t«4. %o «ork he« i»»r.

4aw m im *^rtoitr Circuit SteHr»* prc.*e-*> äorln« thi« f>Art#r.

* 4eecri|M'.ar ef tue vor« iob* ur. \t*— i^«,*»-t» durli^i thla ror.T«-*

l«er etli t>e pre«eet«i te tee forw^«»:^ Anr.««. K^yert.

A te«e • ••{.»••. *rt* •• «Art« ••»•• !r. aj A'c«.*r«*»4 l%re..#:>

f.^» trA'tre» ftM» l«. e Om****f iw*'• ft«U(* t/ ftt« Avt«. f*« b«#tt

«ritte«. «Iklflk ««erriv«« •■ »* »«rt «. YI« TTAT«wrM-MT« 9t J4:»«*

ire>'t 21 UM *«•» t^«iM«4 te RCT f«r pre|***tiar — » Teceetml

!■ —HI7 tofMrt

A $j^m K^j^-t oe tue «cktf%^t tm» WMM rootiei^e. «iteem» UM

pr^en farw./ ^«fM»M«4 (tlt«e4 •tie'tfw IM«« :art«r%^tieA «ite •

Cim\m ■ .*mm' «M iQBp «let Mi « TV«*!««; SfertfMefter? itpm I or ti«

«*e<e |eet>e«t i»« »«•• f4.'*»«4 ->• -»• f.*««* j*«/»« t i« !#•#••*;/

t« lf« lettt« • igoe« «M %*.!• »t«^. «%t'> !• te « m « -eMtle^tle«

•*mm mp» u ef te« eerlte« eort. • «•• *'.%** «er«;» «Mor te« title

«r *^*M» t^«« Mallei

< pr«^e*t ttt,«4 *1 *M«it i* •>>♦• :»*•'♦•" te« »■••* •««*« l« tue fl^

•«.M«^«» oMrf t« te «ytwt ette «te »n'-'attaM of o^i fs.er t« «ireoor»

ftflnMt|4 o^^iw «m «• «i.*o^l«« ef ti!* |*<o^ 1« t« evplero \**

•'*»•• eo-**• •** 9* > «|/ »« •*•'. »or ««r;*».« eiro*««^

lore e«« «0^» IUM

m~tm tet« ««etrect i« rr»f»«»^ «hm»

StMURY AMD AHALYBIS OF TKS VOMC

i. mriPKLK ivr

it. K. Vlntlow,* T. Reeder)

A. UnROOUCTIQi

The ofcjectiv« of tÄit project !• to «tudy the electron beaa - slow

w«ve circuit Intermctlo« In e hl^h-pt^er tr*vellng-w«fe tube. The centi-

pede «low wmve circuit, • coupled cavity «trueture, U tied In this study.

In particular, the «rntlpede has been choten because It has proven to be

on« of the »st satisfactory slow wave structures for a high-power TVT.

^e »thud of Investigation will be to a^asure the aa^lltude and phaae of

the field« In each «»ntlpede cavity while the centipede la mour.ted on the

•lectro« slick and Is being operated ss a TVT. Msasureaenta ov-r t par-

ticular reglor. are possible, such as ••. a sever and In the output section

of the tube. The results of this study will be of utaosl value In

-p^.lali'.r.g the ear./ paraatters afftrctlng the beaa-clrcult Interactlofi.

». DlSCJBBIGi

71.9 flalds Inside each centipede cavity are saapled by a saall, Movable

loof probe which Is coupled to the fields by saall slots located between

the feet of adjacent cartlpede loops, as shown In fig. 1. The probe can

be «rred over V>e entire length of the centipede structure, and It can be

precisely positioned Tver • particular cavity slot. The slxe of the slots

«a« adjusted v pr -»'.le at Tut *ie-ter.th of a allllwatt of probe output

kilowatt Is applied at the centipede Input coupler. The asiplltude

Pr >-•. sup«rvls r

On« eantlptdft f On« periodic cavity / ••etion

vvvvvv ftrob« XrmX |J ^-Loop probe

\ Coupllag slots

To probe aeMureBMit apparetüa

FID. 1—Crots-sectlooel view of the centipede structure shoving field probe end coupling slot location.

-3 -

• • H», .#

♦«•

«^** *# «N»

\ - #

•

m - ■" m.

• •

-

1

t t

i •

'♦

»

'

i

• t

* « •

4Z ^

• •

•

♦

•■

••

»

•

'♦•

■■■••* •

..♦■

» I ♦ -

■ 4 i •

*»•- i

J

•

8 -^

^ " ^ ^^"v.

- rf

I

•. * mm ♦ — \

•»

- S

• * • S *

'•" **

^ ^ ♦

-«-■*» mm 4^» <• %>

» mm «*4» • 4M» •

J

~ -**•>. m * mm •

m *ttb % •**+ M

|

« «Mt t h

»• Ü» in mi ' • «Ml»

•

' 4» t * «P 4»

**^fc '(^ w

—

v ■ 4

1

<•

*

^\

■

I

7

■;

:

i

i *•

• • • •

• • *i <*<» *. «•«*

ii

i

um

20 1<*10 •* dV'^tlon . (28)

Ttm •ppT;*:wk%* mqumllocB /t«14 good ftccurAcy for X < 2.5 dfi/section

r»-.» »tov« «q^Atloe« txmv t««n use4 to cclcuiat* circuit loas for

•««•r%i Tttl-^»« of 0 Th« ecn«*.«r.*.» h«ve beer, choeen to afttch the

fWMUarr.t^: »04 loop b«nd dltperiior. of the orntlpede structure which has

t««r. studied osparlaeew^. /. ^ete constants are

f - 3.200 Oc

■ k ■ 0.3266

7t* fr^jBMy cutoff« of the fundaarnta; passtand are

f, - 2.310 0c

f • 3-200 3c u

ft^are $ «aovs the results ->f the l->st calculations for D ■ 0 , 0.025

aad ;.J^C. It has t>e«n poeslbie to show that If D • 0.0^07 , the

9%IraUted ; 5#s of the «fulealent circuit Is In good agreeaset with the

eap«r'.e»r;ta.^ «»asire-i loss af ths eertlpeie. figure *• coo^ares this

«mlculatloe vltt. the esperlas^tal data.

tork Is cortlRulag or. a smll-slgnal theory for the ckntlpede which

laciaAas the effect of two circuit vavss and tec beaa waves. Circuit loss

Is taeltfied la this theory la the mrxer described in this report. Thus

f*r, • e-elfter prograa ^.a* been written to calculate the propaget' ^n

•»starts of the fctf waves prcviuced by the t^aa-clrcuit coupling. Another

?v «raa Is being levlsed to calculate aaplltude «r.d phase In each centipede

-a*:*./ A rce^lete report on both the experlaental and the theoretical

Mrk it this project Is being written and will be avellable later.

2. BCTBNDED-IlimACTIGi KLYSTOOHS

(N. Chodorcv,* B. KUUM)

A. iU'lVUUUCriON

The primary purpoM of this project it to invtstiost« th«

galn-bandwldth product and converaloo efficiency nhich can be aehiered

In an extended-interaction klystron, with carities consisting of resonated

sections of a alow-wave structure. The current phase of this work is the

evaluation, by aeans of the electron stick, of a three-cavity L-band tube.

In this device, broadband modulation of the electron bean is simulated with

Input and Intermediate cavities containing tunable reaonated sections of

a ring-bar structure. The length of the output cavity can be changed, in

half-wavelength Increments, fron one to five resonant half-wavelengths of

Its component ring-bar structure, and the loading can be adjusted by chang-

ing the terminal conditions on the couplers attached to both ends of the

output resonator.

The tube is better suited for bean-testing on tLe electron stick than

the earlier 8-band model, because the L-band device has higher interaction •

lavedance on the bean axis and can operate at lower bean voltages, thus

facilitating the suppression of parasitic oscillations on the electron

stick. Bean tests of the L-band tube are in progress.

B. OTABiuTr oamnmmnm

In Quarterly Report lo. 9 (*. L. Report lo. IIU3), a now arthod «as described by which one would suppress parasitic oscillations on the electron stick by covering the en-Ire stick with a thin sheet of directionally re- sistive «vier. This approach has been quite satisfactory in that no stick oscillations were observed up to 30 W, the highest bean voltage of interest. Tests at higher bean voltages will not be done until after co^iletioo of the main experiment, since, in caae of breakdown, the resistive film is liable to destruction due to arcing from the glass tube. During trial

■ Project supervisor.

- 15 -

*• *

-

m

•+

~ &r t*,** im

•

■

« .

mm mm

~ .

-

•

• I

• ***•

*• •

r

•

• 4hi-

^m

*•• **»■. 0» -****

•»

.«>

• M * «MT

■4» • «*»< I in-

4» 4» »»*•■*

««*.

>'«♦

-

*. . ^ #► .

- •

•

i I * «

If

M

r

■* m ***

»

• .

0

n

■ .

■ •

4 t

m

% *■»

•

• *

i« 4>«

- '

• •

- —

m -

■

•

. ■ •

i

r

v '

•»

-.

m * * »

»

V •

.. .

•» •

1

**«»

. -

■

t

m 0m i

■

i

•

•M • •

• ■•

m * *• ** •«■>■

^

^ -. . .«•

i .««» ..

-^ ■•

t <■•-• •

. •«*• m"*

i » «. « i

* «• .•

»'-'• «MMMP*«*

•

•»»/

• ••*•»< 'to« ^ ^» »• •«» Jll^llMI I t« • M*l W

• * <• ^» ««tototo*« *.••' •« to to toif*M^« IM« i^|0 <* i •«•!»««M«« i;

>#* p 4» t«"«««» »i« •' •«* «M^ ' •« «« «/ « t« ftf «r*4

--»• •% !■»• •« •••»jw«' •• ^ • .« • «/*« to«to. r\itm to l*

.

- 92 -

?

I e

i «

S x o

[VVV.V^VVVVVV.'vV

similar to that In Fig. 1, including the rf equipment, Is also operational. This Is the first report on this project and no deflnlcive results have yet been obtained. Subsequent reports will give aore detailed result« of analysis and experiment.

-27 -

'• ' •

III *^»*M'*1

I» "

•••% »ha* •<•• «M*« • *»• •• »-. •*-•»• •• .•-•••••• • •^m^tkt^mtt ••• . • «^ «■Ma.»

« t»»»»tr'»»» wttft M v«.^*.»» »aw •«• •9« -4

• «■ «

» - •• •»•■ v i ta> •

.. I

M • «( ••»• »Mis'* •• M««MU«4

-• •• •

• »• •■ • • • «r«« ^w ««f-MX^ f«i>>4

• ■ •• • » ■»•- •«« ««a» »i •' »^w.«», •• ••»*• •• • -• m •• I ■• * •« •••^ •»•» —■» •••*• • •• •

• •>, «w • .»« ..a «*•*« .1 •««•■ • Tt« «»•« i • »• r ■ * «• • **••• '• •• ••••. ^» •*«•»«■ m» »■■II

• 11- « t t-tT ' ■«••• <W ««»• -4 •«• -«««M •• «•!

-« «lb« »^ ««1 *•• ••<• -4 r-«M H •• •«»

■• TiiTAt «^ «■•>» •!• r*<«tJk T«a ••'•1 »4«* ■ •«•

•» S< ••■•• I ■>•»»•%• •» >»'» »»» I4>1 —^1 »I ■»'»•- • i •••4 -» •*• »^ ■»<

' ■«• tf%- .■ •i>i« o»>» pf <!■• i •«••tat« •• y ■■<■» ••• k • • ««^ •• ••• ••ii«»^

M • k M !■•<>)>< T m'MWM 9*>— '•«• •«»••^ttai* - ••■• 4*i ■r«*«'« i«*«ufK Mt*«. *»• * •• f*»i«>l «MMb«i.

•a ■ ••n.is« m» » «riittT HUMBBaitt •.•«•> Ik* *tll- • 1*1 .^. •• -.-••• b> «iMdi 'N* 4M-«*MM •tit k* 14»«if!«« •- • .< MMll*4 • » IM .♦itio*«.«^ •Mi«Hv TV» »«i^*»» ■MM • » . -. .• • j' ■• ••» ♦■

"• m IHH NHoliI H' KMII» "> II Ik* f*»«44 ka* • •.,»• Ml« alk*» >»t •• •."'••• l*ilk*> • i ffl* .'fij.nar,. M ht lt>» t4-atfinl •!•» «Net Iki« iw>*r «>■

10. AVAU AlHLtTV LIMTATION NOTICC» Cw»? ••« h» ••• «• « •»•►•• 4i«»*«iina<><<n of IS* rap •»< »that IlMK t

l> ik* m ■ '•• >••• »■■■k*l M •«■ <M».« •• t»*k*>- • ■ •• ■ •• !••»•>«••* «4 < — Pi.» *M «M* ♦• Ik« p+t- •«* • ••• -fc« l» • •••« •<••• >fc* a* • '• ••• •*

11 »»m UiSkT«*« <■•* 1% ' M •-. »«a >..... . • ••» •*••• IX V<>%«l«l*. WUT*»« k> TntTt I«« ito «MM •« •k* «4»«r>*>*«*» P»» » ' •4h-* •• ^*^««Mt v**»««^ r*r t^g I«. <k* •••*•>» ••>« «*»*»«»' »■' !•>'«4* »*#■««

II ftM*Ta*< T V*i*t •*•%•<•••• V>M^ • k^*l a»« ••< .* » — ■an «4 «k* a» »w« «k4*< ••••a «I <k* npi n •»•• «>i *^k it • .. • • *, I«*- ••»>■*• ^ t» •»« k <i «4 «ka >•■*•.• •• ^« II a<M>«>««« •(•• • i* r»«.'^ ' • ■*»tia*a».— «k*«« •'• w. aHa<ka4

\< •• k^ki« «••••aki* ik*< ik* «vaifAti •! tlaaatft*« »*r*i» k* .» ••• ( • I •• k |«-*0-«l* »I *• »fcoa ' akail ••■ • auk a* i*«« •••••> •! fka «uinat ••••nft < :aa«if>f aliM •! ik* •• • •■«m*«' • .« •*• («••«••i* •«p**a*o<*4 •• ft' «ti fC> «• •

TV*»* ■• a« u«ii*i«*« «a ik* t*«gtk «I ik* akanai < H • • •*• ik* •.a(«>'« ' l**^» ,« •• « I'O I J^* a-al«

I« KVT •(••IM ft*« • M. ara •*. kauailt »*aaMif>»> •»••• •• «K •• |>'•■•.« ikai ikara<i*rtf* • •♦!-'• a*4 «a« k* *«*l *•

Mk4*« **fn*« I.* . «i*: «'•>( tk* ••i--« fta« a«««» •••■ k* •*•*. ia4 • • •!>«• • •*. uiiif . ;••«.!. aii*a .« f*^aifa4 Uaaii da»« »u. k a* a^wya**« ««4*1 «. •«"••! * •* w aa«* •iltia'v par,», i ^la aa»r (• «'at' ••■ - »«i •• j«»4 a* k*< a *4« kw< aill ka f«l|f>«*tf kf a* »i4icaiia« ■>! 'a-kiui al caa last TV* aaai^aarai .| Im*« iv|*« *<bl a*«^«« ■« ««M, ««:

.'nclASJ'.fl« Srcaul» ClaMilicMioa

_l

STS-T-^

I

♦ Ct.* . ■— -J

I ■ «» _ ■—>

*

• • •

*pilm}*n

l.t?**"* "** •- •*"

•

TSt e«sUf*4» tlrvult ftM !••• «i«^«4 for ««•-•'« •uch » —i that tte vr; . ' U *•%! .r*m «f U» pr*«!«« ••*• ^«Mf UM 1»« elr«Mlt lfi*.«r*ct!(ai l«4flH MR to i»».*»* r*» r«Mltt if VUi » it VJKO9\ r%im 1ft ^ptUIf lAf Mm tmaj p»rw.«r« «fr««tt^ ill« ^taii lot« net I». r\uT»e'. r««ul*.« gf Uwory «nd «xyvrtmst «r«

>•*.« - '.h» ti*?tran «tick for th» Mffr»*«taft -f pRnw.t'.f e«c hÄW» town e-wiatff <» fl)r cTwrln« Uw HAiM tttak vtm • ift!» ilMyt ««f 4St%«U< rvttttt^« «V*ftr, ©•€ 1 lift». 1 ^n« wr« r«acrr«4. .9 i« 93 k?. No odor »our»*« of IftotAllll*.^ b«v« bo«r f^und trd i^tnti fVt^hf > ooeliLttloao aai mo ORclLUtiso«. Uork on ccllbrotton of er*»rf*i load «nd M*.ur«««4< nor.t« !■ 4»t:r'.b*d.

3. 3UJI7.'Ü'JI-WA-.T dtudlot on'tpft^v-chaj-ft >• In ftr. tccmlmrm'tS. pRr%iIfInflow «!• -. «tl

in ft eonrtftr.t aacnttlc f'.old .«AVO esntlmwd. Tbo «ftjor «^hftclt thlo ptrtod hft» bo«n on tht ftnftljraif of tho MC&od-ori«r differentUI •]r»*«&; • dlocuc«! f •olution« for cortftln condition« Is pr«Mnt«d.

DP ^H1473 llMlAMifll lomnn ClaatificAtto«

• • - .•»■• *# *%* .4*4

*«*•, *♦

«•■♦ *••.•►•A •

•# m^* «M»% it