Mapping PS results
Data
2D maps
2D (z,x) maps were taken at nominal field (1.8T) for 3 vertical (y) positions (0, +/1 cm), and at 2.0Y for y=0):
1.8T, y=0 2D results: Media: Ps_2d_y0_1.8T.pdf Hall probes 1 (red), 3 (blue) and 5 (magenta) measured By. Probe 2 (green) measured Bx, probe 4 (light blue) measured Bz.
1.8T, y=+1cm 2D results: Media: Ps_2d_yp1_1.8T.pdf. All Hall probes measured By.
1.8T, y=-1cm 2D results:Media: Ps_2d_ym1_1.8T.pdf. All Hall probes measured By.
2.0T, y=0 2D results: Media: Ps_2d_y0_2.0T.pdf Hall probes 1 (red), 2 (green), and 3 (blue) measured By. Probe and 5 (magenta) measured Bx, probe 4 (light blue) measured Bz.
1D downstream maps
1D maps, along z, were taken at 3 field values: 2.0T, 1.5T and 1.0T for 3 transverse (x) positions, at at x=0 only for 1.8T.
2.0T, x=0 result (Hall probes measured By): Media: Ps_1dz_2.0T.pdf
2.0T, x=-10cm result (Hall probes measured By):Media:Ps_1dz_xp10_2.0T.pdf
2.0T, x=+10cm result (Hall probes measured By):Media:Ps_1dz_xm10_2.0T.pdf
1.8T, x=0 result (Hall probes measured By): Media: Ps_1dz_1.8T.pdf
1.5T, x=0 result (Hall probes measured By): Media: Ps_1dz_1.5T.pdf
1.5T, x=-10cm result (Hall probes measured By): Media:Ps_1dz_xp5_1.5T.pdf
1.5T, x=+5cm result (Hall probes measured By):Media:Ps_1dz_xm10_1.5T.pdf
1.0T, x=0 result (Hall probes measured By): Media: Ps_1dz_1.0T.pdf
1.0T, x=-10cm result (Hall probes measured By): Media: Ps_1dz_xp5_1.0T.pdf
1.0T, x=+5cm result (Hall probes measured By): Media: Ps_1dz_xm10_1.0T.pdf
1D upstream maps
1D maps, along z, were taken at 4 field values: 2.0T, 1.8T, 1.5T and 1.0T. The 3 components of the magnetic field were measured.
On the figures below, Top left plot: By vs z. Bottom left plot. Zoom on By vs z. Top right plot: Bx vs z. Bottom right plot: Bz vs z. B unit is Gauss.
2.0T result: Media: Upstrm_2t.pdf. The angle variations during the scan yields negligible correction to By.
1.8T result: Media: Upstrm_1.8t.pdf. The angle variations during the scan yields negligible correction to By.
1.5T result: Media: Upstrm_1.5t.pdf. The angle variations during the scan yields negligible correction to By.
1.0T result: Media: Upstrm_1.0t.pdf. The angle variations during the scan yields negligible correction to By.
Note: The Bz and Bx profiles do not scale between different B field values. This may be because prior to map a given field value, we attached the NMR probe to the measuring arm and then removed it. This may have changed the alignment of the Hall probes measuring Bx and Bz.
1D upstream + downstream together'
Top left plot: By vs z. Bottom left plot. Zoom on By vs z. Measurements are normalized to same current (a few gauss correction). For now, Tosca is arbitrarily matched to the downstream measurement.
2.0T result: Media: Up_dn_2.0T.pdf. There is 11 gauss difference between the two data sets at the center of the magnet. It most likely is due to a difference in angle of the Hall probe. A 0.032 degree angle difference would account for it. Two different arms were used for the measurements and can easily be leveled with such angle difference.
1.8T result: Media: Up_dn_1.8T.pdf. There is 12 gauss difference between the two data sets at the center of the magnet. This implies a 0.038 degree angle difference between the 2 measurements.
1.5T result: Media: Up_dn_1.5T.pdf. There is 7 gauss difference between the two data sets at the center of the magnet. This implies a 0.027 degree angle difference.
1.0T result: Media: Up_dn_1.0T.pdf. There is -4.8 gauss difference between the two data sets at the center of the magnet. This implies a -0.028 degree angle difference
Inclination study
For the 1.8T y=0 and the 2.0T 2D maps, two Hall probes were set to measure the Bx and Bz component of the field in order to verify at what level the x and z translations of the probes during the mapping were flat. We show here the results of these measurements.
2.0T data
Bz component:
Media: Ps_2d_p4_2T.pdf gradients on the z-component of the field,Bz, for 2.0T. Top left: 2D map, top right: color plot of Bz (in Gauss) in function of x and z (cm). Bottom left plot: Bz gradient along x normalized to Bz. Bottom right plot: Bz gradient along z normalized to Bz.
Media: Ps_2d_p4_2T_zoom1.pdf same as above but zoomed for -10<z<45 cm. Normalized B gradients are now in %.
Media: Ps_2d_p4_2T_zoom2.pdf same as above but zoomed for -10<z<20 cm. Normalized B gradients are now in 0/000.
Bx component:
Media: Ps_2d_p5_2T.pdf gradients on the x-component of the field,Bx, for 2.0T. Top left: 2D map, top right: color plot of Bx (in Gauss) in function of x and z (cm). Bottom left plot: Bx gradient along x normalized to Bx. Bottom right plot: Bz gradient along z normalized to Bz.
Media: Ps_2d_p5_2T_zoom1.pdf same as above but zoomed for -10<z<45 cm. Normalized B gradients are now in %.
Media: Ps_2d_p5_2T_zoom2.pdf same as above but zoomed for -10<z<20 cm. Normalized B gradients are now in 0/000.
Gradient study
We looked at gradients dB/B, mostly to determine where an NMR monitoring probe could be installed. (These probes do not tolerate gradient greater than 200 to 600 ppm.)
2.0T data
Media:Grad_2.0T.pdf gradients on the y-component of the field,By, for 2.0T. Top left: 2D map (By in blue/red/green, Bz in light blue and Bx in magenta), top right: color plot of By (in mTesla) in function of x and z (cm). Bottom left plot: By gradient along x normalized to By (in 0/00). Bottom right plot: By gradient along z normalized to By (in 0/00).
1.8T data
Media:Grad_1.8T.pdf gradients on the y-component of the field,By, for 1.8T. Top left: 2D map (By in purple/red/blue, Bz in light blue and Bx in green), top right: color plot of By (in mTesla) in function of x and z (cm). Bottom left plot: By gradient along x normalized to By (in 0/00). Bottom right plot: By gradient along z normalized to By (in 0/00).
Media:Grad_1.8T_zoom1.pdf Same as above but zoomed with -10cm<z<+45cm.
Media:Grad_1.8T_zoom2.pdf Same as above but zoomed with -10cm<z<+20cm and normalized gradients are in ppm.
