MICE analysis meeting - (21/09/2006) 1 Transmittance, scraping and maximum radii for MICE STEPVI M. Apollonio – University of Oxford.

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Presentation transcript:

MICE analysis meeting - (21/09/2006) 1 Transmittance, scraping and maximum radii for MICE STEPVI M. Apollonio – University of Oxford

MICE analysis meeting - (21/09/2006) 2  parameters used in simulation (ICOOL)  TRANSMITTANCE  Define a VACUUM channel (NO ABS, NO RF) and a large aperture upstream/downstream channels  40cm + vacuum channel + 40cm + 90cm  Evaluate amplitude upstream/downstream and do the ratio=transmission/amplitude  Max radius (effect of scraping) and cooling  Use the realistic channel (real radii)  Select throughoing muons  Record the max radius for every z-slice  Parameters used in ICOOL simulation  Pz=240, 200, (170) MeV/c with no gaussian spread  initial emittances: 0.1, 0.3, 0.6, 1.0, 2.0, 3.0 (cm rad)  generated muons per initial emittance  128 positions along Z to study the amplitudes of the beam (Single Particle Emittance)

MICE analysis meeting - (21/09/2006) 3 NuNu NdNd T=N d /N u Scheme for transmission study: No selection on muons Ratio between downstream and upstream particles Scheme for max radius and cooling study: selection on muons  only throughgoing accepted Search for max value of radial distribution R=40 cm R=90 cm Z u =-5.2 mZ d =-5.2 m

MICE analysis meeting - (21/09/2006) 4 CAVEAT: The RF is designed to work with a beam of ~200 MeV/c When working with 240/170 MeV/c the RF config should be changed properly I did it “by hand” changing the phase and the peak voltage Discovered yesterday

MICE analysis meeting - (21/09/2006) 5 N.B.  200 MeV/c: 8.74 MV/m – 90 deg P (GeV/c) Z (m) Still not perfect … 9.1 MV/m – ph.shift=30 deg Pz=170 MeV/c emi=1 mm rad Z (m) P (GeV/c) 8.74 MV/m – ph.shift=130 deg Pz=240 MeV/c emi=1 mm rad 8.74 MV/m ph.shift=90

MICE analysis meeting - (21/09/2006) 6 beam maximum radius + cooling

MICE analysis meeting - (21/09/2006) cm rad 0.3 cm rad 0.6 cm rad 1.0 cm rad 2.0 cm rad 3.0 cm rad P Z =200 MeV/c,  abs =42 cm MICE profile in ICOOL sim

MICE analysis meeting - (21/09/2006) 8  =0.1cm rad  =0.3cm rad downstream P Z =200 MeV/c,  abs =42 cm ratio 40K  heating cooling

MICE analysis meeting - (21/09/2006) 9  =1.0 cm rad  =0.6cm rad P Z =200 MeV/c,  abs =42 cm

MICE analysis meeting - (21/09/2006) 10  =2.0 cm rad  =3.0 cm rad P Z =200 MeV/c,  abs =42 cm

MICE analysis meeting - (21/09/2006) cm rad 0.3 cm rad 0.6 cm rad 1.0 cm rad 2.0 cm rad 3.0 cm rad P Z =240 MeV/c,  abs =42 cm

MICE analysis meeting - (21/09/2006) 12  =0.1cm rad downstream  =0.3cm rad P Z =240 MeV/c,  abs =42 cm 40K 

MICE analysis meeting - (21/09/2006) 13 e=0.6cm rad e=1.0cm rad P Z =240 MeV/c,  abs =42 cm

MICE analysis meeting - (21/09/2006) 14 e=3.0cm rad e=2.0cm rad P Z =240 MeV/c,  abs =42 cm

MICE analysis meeting - (21/09/2006) cm rad 0.3 cm rad 0.6 cm rad 1.0 cm rad 2.0 cm rad 3.0 cm rad P Z =170 MeV/c,  abs =15 cm

MICE analysis meeting - (21/09/2006) 16  =0.1cm rad downstream  =0.3cm rad P Z =170 MeV/c,  abs =15 cm 40K 

MICE analysis meeting - (21/09/2006) 17  =0.6cm rad downstream  =1.0cm rad P Z =170 MeV/c,  abs =15 cm

MICE analysis meeting - (21/09/2006) 18  =2.0 cm rad downstream  =3.0 cm rad P Z =170 MeV/c,  abs =15 cm

MICE analysis meeting - (21/09/2006) 19 transmittance

MICE analysis meeting - (21/09/2006) 20 P Z =200 MeV/c,  abs =42 cm  =0.1cm rad  =0.3cm rad

MICE analysis meeting - (21/09/2006) 21 P Z =200 MeV/c,  abs =42 cm e=0.6cm rad e=1.0cm rad

MICE analysis meeting - (21/09/2006) 22 P Z =200 MeV/c,  abs =42 cm e=2.0cm rad e=3.0cm rad

MICE analysis meeting - (21/09/2006) 23 P Z =170 MeV/c,  abs =15 cm !!!! 4K  !!!!

MICE analysis meeting - (21/09/2006) 24 P Z =170 MeV/c,  abs =15 cm

MICE analysis meeting - (21/09/2006) 25 P Z =170 MeV/c,  abs =15 cm

MICE analysis meeting - (21/09/2006) 26 P Z =240 MeV/c,  abs =42 cm

MICE analysis meeting - (21/09/2006) 27 P Z =240 MeV/c,  abs =42 cm

MICE analysis meeting - (21/09/2006) 28 P Z =240 MeV/c,  abs =42 cm

MICE analysis meeting - (21/09/2006) 29